A journal of the thoughts, pictures, and adventures of photographer and writer Lee H. Rentz. Inspired by nature, with a passion for ideas both visual and literary.
Spring Peeper, Pseudacris crucifer, male peeping during spring mating season
Spring is nature’s most joyous time to be a naturalist in northern latitudes as the world awakens from its long winter sleep. Near our Michigan home, Amish farmers are out in early March, when they begin to collect Sugar Maple sap from the awakening trees, and they use horse-drawn plows to prepare the earth for planting. Wave after wave of birds arrive from the southland, from Sandhill Cranes to Baltimore Orioles and hundreds more. The land awakens with spring wildflowers before the trees leaf out. The first insects appear, including Mourning Cloak butterflies that have overwintered under bark or leaves, and the Common Green Darner that has migrated up from the south. These are all great stories for a naturalist, but there is also a chorus that, to me, signifies that spring is here.
Video of Spring Peeper calling next to the pond
When night time air temperature rises into the range of about 35 to 40 degrees Fahrenheit, each little pool in the forest comes alive with the songs of Northern Spring Peepers. These tiny chorus frogs, each about the size of a thumbnail, peep together around the shores of a permanent or temporary pond–one that has no fish as predators. These are all male frogs trying fervently to attract mates. The calls begin shortly after sunset and end in the early morning hours, before the first traces of dawn light bring predators in the form of birds to the ponds.
Where I live in the middle of Michigan’s mitten, there are numerous little glacial kettle ponds, left as chunks of ice by the last ice age. When the ice melted, it left a depression filled with water, with high banks surrounding the new pond. These ponds are too small to support fish but are just right for Midland Painted Turtles, Common Eastern Toads, and Northern Spring Peepers. I set out on two nights to figure out how to see and photograph the peepers and I chose a pond that I could have easy access to. On the first night, the peepers were calling loudly when my nephew and I slip-slided down the steep hill leading down to the kettle lake. The frogs heard us coming and immediately became deathly quiet. We patiently waited without moving, and the peeps gradually slipped from stealth mode and awakened the heavens again with joyous noise. I spent a long time looking for the source of the calls, and finally found one little peeper calling from under the overhang of a fallen oak leaf right next to the pond. I was only able to get one photograph with a macro lens, a large bulky lens next to these tiny creatures. It was the opposite of stealth.
The setting: a small glacial kettle pond in the forest
Two nights later, I returned to the same pond, this time with my wife, Karen, and with the plan of using a snout wide-angle macro lens, which is about 18” long and only 5/8” in diameter at the lens end, which meant my face could be farther away from the peepers and I could approach them with stealth and cunning, or at least my version of stealth and cunning, which is usually clumsy and loud.
We were quieter in approaching the pond than on my previous expedition, so the peeps barely interrupted their chorus of desire upon our approach, despite our use of bright flashlights. I showed Karen where I expected to see the frogs based upon my previous night’s work, but that proved to be fruitless, or frogless. In searching around a patch of shoreline where a peeper was loudly calling, we just couldn’t find it on the forest floor. But then I happened to see movement about 18” off the ground, and it was a Spring Peeper calling while clinging to the dry stalk of a wild perennial left over from last fall. Its little vocal sac was expanding with each call–so incredibly exciting to see in real life!
Spring Peeper male calling using air sac at throat [photo shows how sac expands]Spring Peeper male vocalizing from its perch on an oak leaf
So I set up my snout lens on a tripod and approached to within about an inch of the calling frog. Meanwhile, Karen used a dive light–a powerful LED flashlight meant for deep dives in the ocean–to light the frog. Somehow, it didn’t mind the light too much and I was able to get hundreds of close-up photographs and videos of this frog and two of its nearby rivals in some of the most exciting hours I’ve ever spent (and, yes, I am truly a boring person). If you ever have the chance to experience the sounds of Spring Peepers while standing among them, don’t miss the opportunity!
MORE DETAILS ABOUT THE LIVES OF SPRING PEEPERS
The Spring Peepers calling in a chorus around a pond are all males, trying desperately to attract mates. Presumably the biggest and loudest male wins the wooing contest, allowing them to mate with the quiet and choosy females. After mating, the female lays eggs in the little pond. Tadpoles are the hoped-for result, and the cycle of life continues.
Spring Peepers are the color of leaf litter on the forest floor: tan or brown or green. Hence they can remain disguised. The second word of their scientific name, Pseudacris crucifer, refers to the large dark cross on the back of each frog. I believe this is part of the camouflage, which breaks up the otherwise uniform color and looks like the veins of a leaf.
A Spring Peeper looks a bit like a dried leaf on the forest floor; the cross marking on the back and other markings on the legs break up the color, making it look more like fallen leaves
These are tiny creatures. In fact, were you so inclined, you could mail seven of them in a one ounce first-class mail envelope, though the USPS and peeps wouldn’t be very happy.
Spring Peepers are tiny in comparison with the loudness of their group
Peepers go into suspended animation all winter, spending the long, cold months hiding behind a flap of bark on a tree or under a fallen log or under the leaf litter on the ground. Their bodies can survive freezing down to about a 17 degree Fahrenheit body temperature because of glucose and other chemicals in the blood that act as antifreeze.
To get these pictures, I used a long Laowa Macro Probe lens with a strong dive light
To make their calls, the males take air into their lungs, then close off their nostrils and mouths. As air is forced from the lungs by muscles, it passes over vocal cords and into the inflated air sac, creating the sound variously described as peeping, chirping, or sleigh bells. The sound is loud enough to prevent sleeping for some people, and is a shimmering shower of sound when it surrounds us next to a pond.
The slightly bulbous toe pads are designed to stick to wet or dry vegetation to facilitate climbingJust to the right of this calling Peeper is the warty leg of a much larger Eastern American Toad
A typical male peeper can make up to 13,500 calls per night, though I didn’t do the math and am depending upon scientists for this factoid.
And the most astounding fact of all: a group of Spring Peepers around a pond is referred to an an “army.” A noisy and tiny army, but an army nonetheless.
Video of the calling Spring Peeper right next to the Toad
The photographs below include other inhabitants of this pond: an Eastern American Toad showing off the gold flecks in his eye; Midland Painted Turtles basking on logs; a few more Spring Peepers; and a view of tree reflections on part of the pond. Click on each to make it larger.
Each winter temporary ice formations form along the orange sandstone cliffs of Pictured Rocks National Lakeshore in Michigan’s Upper Peninsula. Wherever a tiny stream cascades over a cliff, or where water oozes through porous stone, ice forms upon hitting the frigid temperatures of a Lake Superior winter. These formations are reliable enough to have descriptive names given by the ice climbers who return each winter to test their skills on the frozen columns.
I have photographed the formations over several winters, but the winter of 2023 was my favorite because Karen (my wife) and I experimented with backlighting the ice at twilight and at night to give a sense of the color and translucency of the beautiful formations. I find the natural artistry of the ice as stunning as the sandstone formations of the Utah desert, but these are ephemeral and have to recreate themselves each winter. What an experience!
Ice climbing on Curtainsat sunseKaren Rentz at Amphitheater ice formation, with ice daggers overheadAmphitheater ice formationDetails of ice formations in Pictured Rocks National LakeshoreCurtains ice formation lighted by us at nightCurtains ice formation at the end of a winter dayTwo views of naturally sculpted ice behind the CurtainsBehind the Curtains ice formation, lit by the photographer’s lights and by the twilight outsideIce Daggers of the Amphitheater formationCurtains ice formation lighted at nightIce climbing on Curtains; note the ice tools, rope, helmet, and cramponsNorthern White Cedar twigs encased in ice in the Curtains ice formationBehind the Curtains ice formation with blue twilight coloring the translucent iceDetails of Curtains ice formation lighted at night; the round bubble-like shapes are created by water drops melting from the ice column aboveLate afternoon light on the Amphitheater ice formationSculptural details of the Curtains ice formation lighted at nightKaren Rentz at Amphitheater ice formation: the ice columns emerge from seeps in the sandstoneKaren Rentz exploring behind the Curtains ice formationBehind the Curtains ice formation, the translucent ice is reminiscent of a bridal veilFront view of Amphitheater ice formation named for the shape of the alcove in the cliffsDetails of Curtains ice formation; note how the ice takes different shapesDetails of Curtains ice formation lighted at nightAmphitheater ice formation used by ice climbers in Pictured Rocks National LakeshoreIcicle details of the Curtains ice formationDagger icicle details of the Amphitheater ice formation
Pictured Rocks National Lakeshore is located along Lake Superior in Michigan’s Upper Peninsula. Its namesake cliffs are miles long and make for great adventures all year, whether kayaking, backpacking, day hiking, snowmobiling, snowshoeing, cross-country skiing, or taking a guided cruise past the cliffs at sunset.
When we go in winter, we wear Kahtoola MICROspikes when navigating sheer ice at the ice formations, and we watched many people trying to stay upright when they walked in regular snow boots. Wear them! We also take snowshoes in case there has been a fresh snowfall and the trails are buried in deep fluff, though the short trails from Sand Point Road are often packed down by climbers. We also take cross-country skis to use on the nearby groomed trails. When venturing out in winter, we always wear insulated boots, and dress in layers of merino wool long underwear, waterproof snow/rain pants, and down, fleece, and a Gore-Tex shell. Mittens are essential, and chemical handwarmers can help when it’s really cold out. Take high energy snacks. To us, navigating winter is far more rewarding than enduring the bugs of early summer in the Upper Peninsula; just be prepared.
Important information about Pictured Rocks National Lakeshore:
We give our lives meaning and weight by the stories we remember. This has become more difficult with scattered families and friends, and with the blizzard of media that is available every waking second. It has become hard to hear ourselves think and to remember that we have stories to tell that make up the fabric of our lives.
One of the few places of respite is hiking, where the mind is able to focus outward instead of re-exploring the details of frustrating work lives and relationships and politics. Even better is to spend time living in a fire lookout, where the focus is on looking at the vast panorama visible from a peak. Working as a professional lookout is a scarce job these days, but there are opportunities to visit lookouts. There are lookouts that people can rent just to enjoy the sensations of observation and isolation. There are also lookouts where people can volunteer to spend days looking for smokes and greeting hikers. Either opportunity gives people time to experience the solitude and wonder of being in a place apart.
Twilight at Evergreen Mountain Lookout
When we rented the Evergreen Mountain Lookout in August of 2022, we experienced the quiet and intimate setting we so desired. Life was simple there for two nights, with watching the stars and clouds, and waking up to the lookout hidden deep within fog. It was wondrous.
But we weren’t the only ones to have a profound experience here. In looking at the visitor register kept in the lookout, we found that people often wrote poetic passages about their experience with nature in this place. I transcribed some of them here, without names so privacy can be assured, to show how the solitude of an individual or the intimate experience of a small group can be so enthralling.
5 October 2006 “Dinner of steak, rice, and broccoli about 9 p.m. then to bed. By this time the wind was blowing hard. The shutters along the south side of the lookout were bouncing loudly, making a grating noise. Cold out and it was seeking a way inside through every small crack so we tore a towel in strips and chinked the larger cracks. Settle in around 10 p.m. hoping for some sleep. Extremely strong winds blasted the lookout around 1:30 a.m. and the center support holding the shutters on the south side gave way. The heavy shutters bounced wildly. We worried that all the shutters would fall in and smash the glass down upon us. We got up and placed a tarp and air mattress across the inside of the glass and tried to settle down. Sleep was almost impossible. Sunrise was around 6:30 and we rose to clear, very cold skies. The wind had not abated and the shutters still bounce in the daylight. We saw that the center support had thrown its top bolt and we were able to replace it. The wind keeps blowing. Two hawks are braving the wind and hunting in the southern meadow. Wind somewhat easier at noon. Time for a last walk east along the ridge and then out.”
18 September 2009 “Came up to fix a few things reported broken. Unfortunately it was worse than reported. Locks and windows broken, garbage and stuff everywhere. So sad. But we did what we could so hopefully it will last. Weather was absolutely perfect! Could not have been better. No fog, not too hot, cool wind constantly blowing. The sky was so clear we could see forever in every direction. I can’t believe how many peaks there are! Thanks so much for allowing me to come up here. It was a perfect trip. And please, please show respect for this place and take care of it.”
9 August 2013 “Lightning and thunder started in the south at about 10:30 p.m. By 12 a.m. all of us were awake from the wind and by about 1:30 a.m. the storm was right above us and lasted until about 3:30 a.m. when the wind picked up again. Very beautiful and terrifying. A once in a lifetime experience.”
Visitor register for making comments about the experience on Evergreen Mountain Lookout
2 October 2017 “This is my third time at the lookout, but the first time without human companions. Just me and the dog, seeking solitude and some healing after a death in the family. I woke up to a stunning sunrise, mountain peaks visible all around but a magical cloud cover down below. Cold though! Icicles on the lookout–glad I had the dog to keep me warm through the night. Although not healed, the mountains and solo time did me good. Focus on enduring beauty, on the things that knock us breathless and senseless. This helps.”
13 August 2018 “The red sun sits still in the haze of smoke, like an ember burning in a sea of ashes. It is hot outside. The world sits and waits as the earth is changed forever by fire. Brave men and women will risk lives to stop the fire, but we didn’t start it. We have only accelerated this changing world. Water is as pure as gold. Nature is more pure than the love that many have for it. Love and kindness will save the world from fire.”
15 August 2018 “A beautiful smoky day of repairs at the ol’ fire lookout. Met a wonderful woman hiker who used to live in this very lookout almost 40 years ago! The magic of this place is still alive and well!”
15 August 2018 “Smoky. Still a lovely hike, tho seems a lot harder than in the summer of 1976, when I was the lookout here.”
5 September 2018 “Simply beautiful up here. Mountains in every direction, too many to name. Wonderful artwork of nature. Had fun picking huckleberries. Wish we would have stayed the night. Next time. Our 3rd anniversary activity of choice.”
16 September 2018 “A rainy, snowy, cloudy trip and we couldn’t ask for anything more. Had a fantastic time hanging out in the cabin watching the weather. Can’t wait to come back and do it again.”
Stories written in the vistor register
10 August 2019 “On this day 5 years ago I stayed overnight in 3 Fingers [another lookout]. After going home on the 10th I had a heart attack. Was great to be able to spend the night and celebrate life. If you go to 3 Fingers check out the lightning stool I made for my first year anniversary of the heart attack!”
11 August 2019 “It felt like something out of a storybook to hike up and up into the clouds where you couldn’t see thirty feet ahead or behind you. Wildflowers that I thought I wouldn’t see again this late in the year bloomed along the trailside. It was magical finally seeing the lookout appear out of the mist. Then to wake up surrounded by it just makes me feel like I’m in another world.”
Interior of Evergreen Mountain Lookout
Hikers are not the only people who have found the fire lookout to be an inspiring muse. There is a long tradition of writers who have spent summers working for the U.S. Forest Service and National Park Service perched in their mountaintop retreats, looking for smokes while simultaneously thinking and taking notes and working on poems and novels. Without a boss looking over their shoulders, the thoughts could rise from the depths like columns of smoke on a distant ridge.
Gary Snyder, a poet who has written a lifetime of poems of depth, infused with Zen Buddhism and nature, watched the landscape atop Sourdough Mountain Lookout in the North Cascades of Washington in the summer of 1953. His meditative book Riprap and Cold Mountain Poems begins with this gem from that time:
Mid-August at Sourdough Mountain Lookout
“Down valley a smoke haze Three days heat, after five days rain Pitch glows on the fir-cones Across rocks and meadows Swarms of new flies.
I cannot remember things I once read A few friends, but they are in cities. Drinking cold snow-water from a tin cup Looking down for miles Through high still air.“
Decades later Tim McNulty, a writer from the Olympic Peninsula, also stayed in Sourdough Mountain Lookout for a season. He found it a profound experience, and wrote evocative poems about his time there. These are included in his book of poetry called Ascendence; here is a wonderful excerpt from one poem
Night, Sourdough Mountain Lookout
“I light a candle with the coming dark. Its reflection in the window glass flickers over mountains and shadowed valleys seventeen miles north to Canada.
Not another light.
The lookout is a dim star anchored to a rib of the planet like a skiff to a shoal in a wheeling sea of stars.
Night sky at full flood.
Wildly awake.“
Smoke from Irving Peak and White River Fires (2022) viewed from Evergreen Mountain Lookout
Jack Kerouac, writer of the cultural phenomenon On the Road, a vibrating-with-life contrast to the staid and conforming 1950s and early 1960s, worked on Washington’s Desolation Peak Lookout in 1956, a time that inspired some of his work on the books Desolation Angels, The Dharma Bums, and Lonesome Traveler.
“Thinking of the stars night after night I begin to realize ‘The stars are words’ and all the innumerable worlds in the Milky Way are words, and so is this world too. And I realize that no matter where I am, whether in a little room full of thought, or in this endless universe of stars and mountains, it’s all in my mind.” fromLonesome Traveler
Twilight at Evergreen Mountain Lookout
Norman Maclean worked on Elk Summit Lookout in Idaho, and later went on to pen Young Men and Fire and A River Runs Through It and Other Stories. These stories captured tragedies in the American West where he made his home.
“In the late afternoon, of course, the mountains meant all business for the lookouts. The big winds were veering from the valleys toward the peaks, and smoke from little fires that had been secretly burning for several days might show up for the first time. New fires sprang out of thunder before it sounded. By three-thirty or four, the lightning would be flexing itself on the distant ridges like a fancy prizefighter, skipping sideways, ducking, showing off but not hitting anything. But four-thirty or five, it was another game. You could feel the difference in the air that had become hard to breath. The lightning now came walking into you, delivering short smashing punches.” from A River Runs Through it and Other Stories
Historic Evergreen Mountain Lookout in sunset light
Edward Abbey wrote Desert Solitaire: A Season in the Wilderness which became one of my personal guiding lights since the time I first read it as a college freshman over 50 years ago. Abbey writes of his adventures in the old days of Moab, Utah, before it became a recreation mecca. Abbey’s book helped turn Moab into the “industrial tourism” machine that he detested, but I’ll save that rant for another time. Abbey needed to make ends meet, like all of us, so he worked at the Bright Angel Point Lookout on the North Rim of the Grand Canyon for four seasons, where he stationed his typewriter near the Osborne Fire Finder.
“Wilderness is not a luxury but a necessity of the human spirit, and as vital to our lives as water and good bread. A civilization which destroys what little remains of the wild, the spare, the original, is cutting itself off from its origins and betraying the principle of civilization itself.”
“No more cars in national parks. Let the people walk. Or ride horses, bicycles, mules, wild pigs–anything–but keep the automobiles and the motorcycles and all their motorized relatives out. We have agreed not to drive our automobiles into cathedrals, concert halls, art museums, legislative assemblies, private bedrooms and the other sanctums of our culture; we should treat our national parks with the same deference, for they, too, are holy places.” both quotes from Desert Solitaire
Mountain Hemlocks above low clouds at twilight
Fire lookouts, and hikes, and long bike rides, and long road trips: times and places that are apart from the rest of life. Places and times to think deeply, to breathe in the subterranean thoughts swirling up from our brains and the soil and the landscape.
Karen and I have encountered Black and Grizzly Bears occasionally, and these sometimes make for memorable stories. Here are five adventures that we can’t possibly forget, along with assorted bear photographs I’ve taken in recent years.
American Black Bear feeding on Gray’s Lovage in July, Mount Rainier National Park in Washington State
WATCHING BEARS AT THE DUMP
Copper Harbor on Michigan’s Keweenaw Peninsula, circa 1959
My family used to take camping vacations to state parks back in the 1950s and 1960s. Of those, Fort Wilkins State Park at the tip of Michigan’s Keweenaw Peninsula, which sticks up like a long curved finger into Lake Superior, was a favorite. This was an early army outpost established in 1844 to keep order during a copper boom in the region, and there were cannons and a fort that excited the small boy in me.
But the coolest thing we did as a family there was to drive the ’57 Chevrolet station wagon to the dump and wait until dark, lined up with all the other classic Detroit cars. At deep dusk the bears arrived one by one, until there were five. They poked their snouts into the fresh garbage and turned over cardboard boxes with their powerful legs and claws, each working independently of the others. I remember one was a big cinnamon-colored bear, while the others had black hair. I’m sure the dump smell and flies were awful, but it was thrilling to see bears up close for the first time in my life.
Dumps used to be a special way for families to experience bears outside each small town in the Upper Peninsula. Those days are long gone, but those of us who experienced bears at the night dumps will never forget the adventure. Here is a sampling of memories of that time by many people: https://www.pasty.com/discuss/messages/313/617.html
American Black Bear traversing in an alpine meadow on Sahale Arm, North Cascades National ParkAmerican Black Bear foraging in a Ponderosa Pine forest near the ghost town of Garnet, Montana, USA
SLEEPING WITH A BEAR
1982 in the High Peaks of the Adirondacks
We were camped in a dense stand of Red Spruce high in the mountains. We knew that there were bears in the mountains, so we hung our food, but we didn’t have the mental acuity or experience to hang the food correctly in a tight grove of toothpick trees.
An hour later, in the tent, we heard a dreaded sound outside. I opened the zipper, and of course it was a big American Black Bear of the bad boy kind. I startled it by poking my head out the opening, and the bear responded by immediately climbing a tall spruce within five feet of our tent. So, it was a standoff, with me looking nervously up at the bear and it looking nervously down at me, occasionally clacking its teeth to warn me how fierce he was.
The standoff lasted all night. I had finally fallen asleep and didn’t wake up until we heard the sound of claws descending on bark. We quickly got dressed and I assumed the bear had skedaddled away, but instead it went directed to our hanging food bag. I think the bear had gotten into the food before coming close to the tent the night before, and the torn bag waving in the breeze and a pile of plastic bags below told the story. We finally chased the bear away, but we were short on food the rest of the weekend trip. My morning ration of instant coffee had bear saliva on its torn plastic container, and we never did find the peanut butter.
In the years since then we have learned to engineer a relatively bear-proof hanging bag under most circumstances, but it is often a challenge that most hikers don’t master, based upon most of the hanging food bags we see. Bear spray is also a good idea, though I don’t normally carry it in Black Bear country.
Grizzly Bear searching for food, accompanied by a scavenging Coyote, in Yellowstone National Park
FENDING OFF A BLACK BEAR WITH STONES
1989 in the Mount Baker Wilderness, Washington State
We left our rental car in the parking lot at the trail leading to Hannegan Pass to begin a backpacking adventure in North Cascades National Park. At the trailhead we had an unusual siting of a Black Bear wandering around, and in the trail register comments someone wrote “pesky bear!” We set out on our ten day backpack into lowering clouds.
We set up camp among blueberry bushes and conifers, cooked dinner and hung our food in two heavy bags from a tree branch, then retired to our tiny tent. The next morning, we got up and immediately found a Black Bear under our food hang, trying to get at it. I yelled at it and threw some stones to try and chase it away, and it left, But I had a feeling that it wasn’t done with harassing us, so I went to where I anticipated it might approach the bag next, and lo and behold, there it was! So I threw more stones, hoping to discourage it. After a couple more parries, the bear finally left us alone.
Later in the day however, as we were hiking, a bear descended a mountainside at an angle that would intersect with us, causing us to be really apprehensive about its intent. It came within 20 yards of us, and I suspect it was the same pesky bear, but we hiked beyond without incident. The rest of the trip was bear-free, but those first two days were more than a bit unnerving.
Tracks of Grizzly Bear 399, who was accompanied by her two cubs of that year in snow in Grand Teton National Park, Wyoming. She had been seen here five minutes before we came on the scene.
BEING BLUFF-CHARGED BY A BLACK BEAR
1991 in Enchanted Valley, Olympic National Park
We hiked the 13+ mile trail to Enchanted Valley on a spring day, early in the season when Red Alder leaves were emerging. It is a long hike but the setting in the valley was worth it, with waterfalls cascading off the gray cliffs. We set up camp and talked to a national park ranger about a murder mystery we were reading called The Dark Place, by Aaron Elkins, which was set in that very part of Olympic National Park. We hung our food from a tree, then soothed our hike-weary bodies in our warm sleeping bags.
The next morning we awoke to see a bear foraging in the hummocky gravel of the Quinault River’s flood plain. I went out with my camera on a tripod and got too close to the bear; I knew that when it bluff-charged me and I hurriedly backed up, even with my long telephoto lens.
Then the ranger came out of the old hotel building, converted to a ranger station, and also saw the bear. He thought it was an opportunity for a photo, just like I had. He was wearing a wife beater undershirt instead of his uniform at that early hour, and he also had a camera. Only his was a point-and-shoot camera without a telephoto, so he had to get much closer to the bear than I did. It then bluff-charged him! It was really funny to watch a ranger–who knew better–get so close to a bear!
Evidence of an American Black Bear feeding on the cambium of a Subalpine Fir using claws and teeth, in Mount Rainier National Park, Washington State
SURPRISING GRIZZLIES ON THE TRAIL
2010 Mount Assiniboine Provincial Park, British Columbia
We were high in the Canadian Rockies, staying in log huts with hobbit-height doors during a snowy September. This park is known for its Grizzly Bears, and we had to be careful about walking to the outhouse from the cabin. One morning we awoke to Grizzly tracks near the cabin, heading up a nearby trail we were going to walk later in the day. When we did the hike in a group, we came upon big rocks that the bear had turned over and dug around using the enormous strength in its front legs and claws (these huge muscles terminate in the hump on the back that is characteristic of this species). It had been searching for hibernating ground squirrels or marmots and could quickly dig them out of their winter chambers.
One morning our group rose well before the crack of dawn to walk a trail past Lake Magog and the Mount Assiniboine Lodge and into the trail system beyond. We had headlamps on because it was a dark, cloudy morning. The man ahead of me suddenly stopped and said “There is a big mammal in the trail just ahead.” We waited, and a Grizzly cub, hefty after a summer of ground squirrels and berries, crossed the trail. Then there was another, soon followed by mama. We had our bear spray unholstered and at the ready, and Karen began whistling three loud blasts with her whistle to alert another part of our group that had been late in getting started.
Fortunately nothing bad happened, even though we were in extremely close proximity to the mother and cubs. They left the trail area and moved off about two hundred yards, where the mama began furiously digging for ground squirrels, with the two cubs imitating her. She even stood up on her hind legs repeatedly to sniff the air; we think there was probably a big male–dangerous to her cubs–in the area, based upon a guy we met who was camping with his dog in the nearby campground. His bear encounters were scary enough that he rented a cabin for the next night.
Nothing like Grizzly encounters to set the heart racing!
Grizzly Bear mother standing on hind legs after scenting or hearing a possible threat to her cubs at Magog Lake, Mount Assiniboine Provincial Park, British Columbia, CanadaKaren Rentz showing the depth of a fresh hole dug by a Grizzly Bear into the burrow of a Columbia Ground Squirrel, on the border of Mount Assiniboine Provincial Park and Banff National Park, CanadaGrizzly Bear staring with menace at the photographer near Magog Lake, Mount Assiniboine Provincial ParkGrizzly Bear sow and cubs digging for Columbian Ground Squirrels near Magog Lake in Mount Assiniboine Provincial ParkAmerican Black Bear feeding on Gray’s Lovagein Mount Rainier National Park in Washington StateAmerican Black Bear feeding on Gray’s Lovage in Mount Rainier National Park in Washington State
You can see more of the work of photographer Lee Rentz at his website: leerentz.com
My wife and I made a decision long ago that we enjoy the dramatic cycle of seasons in the north, so we avoided the rush of our generation to move to Florida or Arizona. I’m paler as a result, but am especially enjoying winters in central Michigan because of the snowfall. In fact, when the fat flakes are softly falling, I will often venture out on foot or in the Subaru to see what I can find to photograph.
The pictures here, taken over the last six years in Michigan, the Canadian Rockies, Newfoundland, Iceland, and a few other places represent my passion for falling snow. I love how the thickly falling flakes dissolve the landscape into what seems like molecules, where I get a glimpse of the fundamental nature of the universe. Nothing is as solid or as stable as it seems, and everything we know and love is made up of infinitesimal and fundamental particles buzzing around each other in the void. My glimpse into the great mystery.
You can click on any of the photographs here to see it larger and to view all of them using the arrow on the right. Each is available for $100 in a 12 x 18″ print that you can mat and frame however you like. Free shipping in the USA and each limited edition cotton print comes with a Certificate of Authenticity and a description of the photograph. Contact me at lee@leerentz.com for information; you can also go to http://leerentz.com for more options, including metal prints.
Southern Flying Squirrels, Glaucomys volans, glowing hot pink on their underbellies when illuminated by a 365 nm UV flashlight, in a rare phenomenon known as biofluroescence
I awoke last night at midnight to flashes of light from a motion sensor floodlight on our deck. I wasn’t thinking of prowlers, because I suspected the flashes of light were triggered by Southern Flying Squirrels coming to visit for the sunflower seeds I had tossed out just before going to bed.
I crept downstairs and carefully opened the sliding door, letting in frigid February air. The deck light came on briefly, enough that I could see the tiny squirrels dashing up through an opening in the deck around a huge Northern Red Oak. Each squirrel would come up, grab a sunflower seed, then dash down the tree trunk out of sight. This happened so fast that I couldn’t see how many squirrels there were, though at one point I saw three. There may have been more. On this night they were nervous and did not stop long enough for any photos.
We’ve had Southern Flying Squirrels at our home in Michigan each winter, and I’ve photographed them at night several times using incandescent lights on the deck. They made for good photographs, with their gray-brown fur and a cuteness factor of huge bulging eyes and little pink lips, but their coloration was subtle to my eyes and essentially no different from most mammals, which are colored for camouflage rather than display.
Then scientific knowledge suddenly changed. About four years ago a Wisconsin forestry professor, Dr. Jonathan Martin at Northland College, was in the woods at night looking up toward the forest canopy with an ultraviolet flashlight for lichens and other fluorescing lifeforms, when a hot pink missile glided overhead. He identified this as a Northern Flying Squirrel, and its normally white belly lit up hot pink in ultraviolet light. He found this astounding, and asked a colleague to investigate flying squirrel skins in a couple of museum collections to see if the phenomenon could be confirmed. It turned out that in those collections, the bellies of all three species of North American flying squirrels–Southern, Northern, and Humboldt’s Flying Squirrels–glowed bright pink under UV light. Even specimens over 100 years old. Male and female, young and old, they nearly all glowed.
Since we have easy access to flying squirrels at our home in Central Michigan, I decided to observe this phenomenon for myself. I obtained a 365 nm UV flashlight that is powerful enough to look almost into the treetops and began looking at these squirrels on nights they chose to come to our feeding station. They don’t come every night, but when they do I often get up in the middle of the night to observe and try to photograph them. It isn’t easy to photograph little nervous squirrels by a relatively dim (to our eyes) UV light, but I’ve had some success represented by the pictures here.
Southern Flying Squirrel showing biofluorescence under UV light on the left, with the same species illuminated by tungsten light on the right. The belly fur changes from off-white to bubblegum pink when struck by UV light.
Why do flying squirrels glow? That is still unknown. What is known is that at dusk, dark, and dawn, the air is bathed in proportionately more ultraviolet light and far less light from the visible spectrum than in daytime. This UV light–when converted to visible light by fluorescence–makes the flying squirrels more visible to each other. This is even more true when snow blankets the forest, since snow reflects UV light. It also appears that flying squirrels’ eyes, unlike ours, can see into the UV spectrum, so this ability may also be involved.
Again: why do they use biofluorescence and UV light at night? There are a couple of possibilities that spring to mind. Based upon the three flying squirrels I observed on that recent February night, I think it’s possible that the squirrels use their bubblegum pink undersides to keep track of each other at night. These squirrels are highly social, with reports of 25 to 50 Southern Flying Squirrels roosting communally in a hollow tree. So why wouldn’t they follow each other to food sources? Some of my pictures show them sitting side by side, dining quietly together on the sunflower seeds I put out. They seem to enjoy a more peaceable kingdom among their kind than do the daytime Eastern Gray Squirrels and American Red Squirrels we also get in Central Michigan. Feeding together also means more big eyes to look for predators–much as goldfinches and other songbirds feed communally as a strategy to detect hawks.
There is another tantalizing possibility for the pink color. Three large owls that also live in this region–Barred, Barn, and Great Horned Owls–also have bellies that fluoresce hot pink under UV light, though their coverings are feathers rather than fur. These owls are the chief predators of flying squirrels. Do the flying squirrels mimic the owls to fool the predacious birds into thinking they are seeing other owls when in the air? Maybe. I find this possible. The fluorescing fur is mostly on the belly and undertail of the squirrels, with just a minor hint of color change on the back and virtually none on the tail. Once a flying squirrel lands on a tree trunk, its back and tail make it almost invisible to predators because the glowing belly is nearly hidden.
Alternatively, perhaps the owls are mimicking the flying squirrels, fooling the little squirrels into thinking they are seeing others of their own kind. This would allow the owls to silently approach the flying squirrels and suddenly grab the little creatures.
Or perhaps all three of these mechanisms are in play: bubblegum pink signals the presence of flying squirrels to each other, but also both disguises them from owls and identifies them to owls, if any of that makes sense. Coevolution at work.
Biofluorescence also extends to the Virginia Opossum in this region, but is apparently unknown in other mammals here. It turns out the phenomenon is new enough that the chemical and physical mechanism is still unknown. I suspect this will be studied in coming years, with possible applications for industry. Or not. Knowledge is its own reward.
I will be watching these creatures over the coming weeks and years, both with and without the assistance of UV light. The mysteries of nature are an ingrained part of my life and I find observations and photography endlessly fascinating.
The photographs above are a good representation of the Southern Flying Squirrel in UV vs visible light. The final photograph shows the deck setting at night where all the pictures were taken, and includes one flying squirrel for scale. Click on the photographs to see them larger.
Here are some other sources that examine this discovery:
The story of our 1984 journey to Gates of the Arctic National Park in the Brooks Range of far north Alaska in words and in photographs. Below the story there are many more photographs that you can click on to enlarge and also see photo captions.
“You guys might want to get out of the tent … there’s a Grizzly out here.” Denis Davis startled us out of our perpetual twilight dreams with that simple statement, and we’ve rarely gotten dressed so fast. The Griz was several hundred yards away on the Arctic tundra and was steadily traveling up the treeless valley. If it smelled us–which it probably did given that we had been backpacking for a week–it didn’t stop to check us out or even look our way. For that we were grateful, given that we had no protection in the era before real bear spray.
This two-week backpacking trip in Alaska’s Brooks Range originated in Denis’ Christmas card for 1983, in which he suggested several possible adventure trips for the coming year to a number of his friends. We were the only ones who responded, and we liked the idea of backpacking in Gates of the Arctic National Park, which was at that time a newly minted national park.
Karen Rentz backpacking in 1984 in Gates of the Arctic National Park, Brooks Range, Alaska, USA
We began planning for the trip in conjunction with Denis and his wife at the time, Elaine. We needed to carefully consider every aspect of our equipment for weight and usefulness. I needed camera gear, including a 500mm lens for wildlife, a macro lens for wildflowers, and a wide-angle lens for landscapes, plus 25 rolls of Kodachrome film. Tents at the time were limited, and we needed a tent strong enough to withstand possible snow, so we brought the legendary North Face VE-25, a favorite of Mount Everest expeditions, but which weighed 12 pounds! Karen brought a hiking staff that was actually a beaver-chewed stick from the Adirondacks; she had to check it on the cross-country flight because the gate attendant said it looked like a weapon. Our clothing was in the pre-fleece era and included items Karen sewed from Frostline kits. We had jeans, army surplus wool pants, wool shirts and sweaters, long underwear, rain-resistant pants, and Frostline parkas. We also each had an insulated Frostline vest; these would also serve as pillows. Plus stocking caps and Frostline mittens and heavy wool socks for hiking. Water-resistant hiking boots were essential to combat the wet tundra and snow.
Lee Rentz backpacking in 1984 in Gates of the Arctic National Park, Brooks Range, Alaska, USA
Considering food, we had to keep it light. Karen used our dehydrator to dry all sorts of precooked meals, not all successfully. Dried shredded cheddar cheese was crunchy and tasty, but melted away needed fats. For lunches we ate Pemmican Bars, which were an early protein bar from the 1980s. For breakfast and dinner we cooked on a Svea stove that ran on white gas. Our simple meals included a commercial beef stroganoff, rice and beans and dried cheese and chocolate. Breakfast always included hot drinks: our standing joke on this mosquitoey trip was that when a mosquito would land in the hot chocolate, we would fish it out, but any leftover mosquito legs would just go down the hatch. We lost weight on this trip because our calorie intake couldn’t possibly keep up with our exertions.
At the start of the trip, Lee’s backpack weighed 78 lbs, with Karen’s about 59. Karen had a full bright orange daypack lashed on top of her backpack; she sewed it from a Frostline kit.
After all our preparations, the time for travel came in late July, 1984. We flew from Syracuse, New York to Anchorage, Alaska. There we boarded a flight to Fairbanks, and then a smaller plane to Bettles, a tiny Alaskan bush town on the Koyukuk River. This is where we did our final planning and packing for the trip, with our gear splayed across the runway’s edge. We talked to some guys who were heading into another part of the Brooks Range who had long rifles with them for protection and hunting; we felt quite naked by comparison. But at the time, it was illegal for hikers to carry a gun in a national park, so that wasn’t even a possibility for us.
With our packs finally stuffed, we walked to the office of the bush plane to give them our final itinerary. We were to be dropped off by float plane at a small lake in the western part of Gates of the Arctic National Park, then we would hike for about two weeks and 50 miles through Arctic tundra, following rivers. Our biggest challenge would be a climb over unnamed mountains, hoping we could get to the crest, then down the steep cliffs on the north side. This was all uncertain, because it was possible no human being had ever traveled this route over the mountains and the available topographic map was not detailed enough to confirm cliff locations. This was real, raw wilderness in the extreme. If all went well, we would follow a drainage from the mountains, hiking north until we reached Kurupa Lake, where we would be picked up by float plane.
Dramatic arctic landscape between the Arctic plain and the high summits of the Brooks Range, Gates of the Arctic National Park, Alaska, USA
We finally shouldered our heavy packs and walked to the Koyukuk River, where our float plane magic carpet awaited. This was a Canadian-made bush plane, a De Havilland Beaver, that was and is the workhorse of the far north. We took off from the river–our first experience on a float plane–and followed the river west for a ways, with us watching for Moose among the Black Spruce trees along the river. Eventually the pilot left the river and turned the plane north, taking us over turquoise tarns and rugged, sharp peaks where the trees eventually dwindled to none, leaving us over a treeless tundra. We came to a broad opening in the mountains where several lakes shimmered, and one of those was our destination. The pilot descended and made a smooth landing on the lake, then taxied over to the shore. We didn’t even get our feet wet while unloading our gear. After confirming our final meeting point for a rendezvous two weeks later, the pilot taxied into the center of the lake, then took off with a roar, leaving us feeling lonely on the vast tundra. The pilot had been instructed to pick us up at Kurupa Lake, but if we weren’t there, then he would look for us at our drop-off lake in case we couldn’t make it over the mountains.
Two things happened within minutes: we found a distinct fresh Gray Wolf track in the wet soil between tussocks, and mosquitoes descended upon us in Biblical multitudes. We were in the Alaska Wilderness!
After a few minutes of gazing out over the lake, we pulled out our mosquito head nets, shouldered our lead-filled packs, and set out on a two-week journey through one of the wildest places in North America. We consulted our topographic maps, then headed over a ridge that looked down over a long valley stretching toward a line of mountains in the distance. Our route would take us down the valley along an unnamed river past unnamed mountains.
Our trip took place at the warmest time of year in the Brooks Range, with temperatures hovering above 70°F. At our feet, arctic wildflowers bloomed in profusion–most of them hugging the ground to avoid the drying winds–while along the river Arctic Fireweed was vivid. In this warm weather, the clouds of mosquitoes were legendary. To cope we wore head nets, plus applications of DEET-containing Jungle Juice. Karen had sewn the placket gaps above our sleeve cuffs shut to keep the bugs out. But we discovered that they could still bite through our jeans, so we ended up with a lot of itchy welts. During the first two days of hiking along this long valley, we saw no large charismatic wildlife, so we focused upon cool birds we had never before seen, such as a Wandering Tattler on its nest site, an American Golden-Plover, and a Gray-Crowned Rosy Finch.
We set up our first campsite on the lower flanks of a mountain high above the valley. This was northern Alaska during the height of summer, so the sun barely set, making the inside of our yellow tent look like perpetual dim daylight all through the long night. We thought it might be hard to sleep in these conditions, but we were so worn out from hiking with heavy packs that sleep was not a problem. As we gazed up the valley the next morning we could see where we would camp the next night; an expansive view.
Grizzly Bears were always on our minds, but not enough to keep us from sleeping. Without bear spray and without guns, our defense lay in our numbers–with four of us, that should work as a deterrent against daytime attacks. At night, we needed to protect our food supply from bears, but there was no place on the open tundra to hang our food. Each night we took our packs and placed them together about 100 yards downwind from our tents. Atop the packs we placed our cooking pots with stones in them, so a raid on the packs would alert us with noise. We also had little mesh bags made by Karen containing mothballs that we hoped would cover up the scent of food, or at least serve as a repellent. While hiking, the mothballs were triple bagged to contain the strong fumes.
The next day we hiked further along the river, coming upon a spot where there was enough shade from the mountains that river ice several feet thick had not yet melted; it resembled glacial ice, with its aqua-blue color. Later, we were setting up camp when we heard the blowing and galloping of a mammal coming our way. It was our first Caribou, and it appeared to be running in terror. But nothing was chasing it, and it was possible that there was a parasitic larva called a nosebot driving it crazy. Or maybe it was the ever-present mosquitoes.
The third day out, we left our broad, open valley and began ascending a steeper route into the mountains. This was the drainage we hoped to take over a high pass at the northern crest of the range. As the day wore on, the cloud cover increased and there was a noticeable chill in the air. We set up our tents high in a cirque, with sharp peaks rising around us, then finished our camp chores and wriggled into our sleeping bags. A drizzle began, followed by rain, then silence.
When we awoke the next morning, there was about four inches of fresh snow on the tents. It was cold, and we decided it would be too treacherous to make our climb over the pass in these conditions. So we took a snow day, mostly napping and reading inside our tents, waiting for the weather to pass.
We hiked to a snowy, high, unnamed pass in Gates of the Arctic National Park, in the northern part of the Brooks Range, Alaska, USA [No model release; available for editorial licensing only]
The following morning the weather had again changed, with sunny blue skies appearing between clouds still hanging in. We decided this was our day to face the biggest challenge of the trip, so we loaded up and headed straight up the snowy steep and rocky slope toward the pass. When we reached the pass, the view straight north to the Arctic Plain greeted us. The wind was blowing hard over the pass, so we took shelter against a rock buttress and ate lunch. Then Denis and Lee split up to try to find a safe route down from the pass. Denis went to the east and Lee ascended to the west, each looking carefully at our chances. When we got back together, Denis said his side of the pass was not feasible, but Lee decided we had a good chance of making it if we carefully went in his direction. It involved climbing higher, then going sidehill in snow while hugging a cliff above a steep, snow-covered dropoff. If we went far enough, we would reach a scree slope leading all the way down to the valley at a steep angle.
Lee turned to Karen, who gets nervous with exposed heights, and said “You’re going to have to be brave.” She was, and we carefully inched along the cliff face without mishap, then began our steep descent. The scree slope was snow covered, but we forcefully stuck our legs through the snow to the soft rocky debris (almost like a fine gravel dune) and felt almost entirely safe. When we made it to the bottom, it was with a sense of triumph and relief that the most difficult part of the journey was behind us. We celebrated by making a no bake boxed cheesecake chilled in the snow, and all was right with the world.
The bad weather closed in again the next morning, and we hiked down the length of a lake with wet snowflakes steadily falling. Very briefly the mosquitoes were too chilled to move. The mountains were gleaming with their coat of fresh snow. We climbed out of the valley into some foothills. Then, while eating lunch we saw movement in the distance. Binoculars revealed one of the most amazing sights of our lives: thousands of Caribou traveling across the rocky terrain! We changed our route to intercept the herd and over the following days we watched and photographed them extensively, burning the sight into our memories as well as on film.
We camped that night on a ridge in the path of the Caribou, and all night we could hear the clicking of tendons in their ankles as they walked past our tents. It is a fascinating phenomenon, and apparently it serves to keep herds together as they travel–even in the clouds and fog of the mountains they can hear each other enough to stay together. The Caribou traveled well-worn paths along mountain slopes and through wildflower meadows. There were bull Caribou with huge antlers, as well as females with smaller antlers and young of the year racing around. These were part of the Western Arctic Caribou Herd, which migrates twice yearly between the calving grounds on the Arctic Plain and the wintering grounds south of the Brooks Range. When we saw them, they were gathered together in a huge group, but not yet beginning their fall migration south. Our days among the Caribou were wonderful, as we saw them crossing streams and silhouetted against snowy mountains.
Caribou, Rangifer tarandus, migrating through the mountains of Gates of the Arctic National Park, Brooks Range, Alaska, USA
On another morning about this time in the trip we saw our first Grizzly Bear; fortunately it didn’t pay us any attention. It was astounding to see how large it was and how prominent was the hump on its back. One advantage of hiking in the tundra is you can see bears from a long way away. We still remember Denis and Elaine talking about being first on the scene of a near-tragedy in Glacier National Park. A family of four had been hiking together when they surprised a Grizzly in the forest. It attacked, and had one child’s head in its gaping mouth when the father jumped on its back. The bear broke the man’s arms but then called off the attack. But enough about scary bear stories.
Our packs were now a bit lighter from the food we had consumed, and our still-young bodies gained strength as the days wore on. One day Denis proposed we go off on our own and he and Elaine do the same. That sounded good, and we ventured into the Kurupa Hills. Our highlight was seeing a young Dall Sheep lying on the tundra, and later seeing some adults crossing a talus slope. At our campsite we enjoyed watching an Alaska Marmot, though not-so-much an Arctic Ground Squirrel who chewed through one of our plastic water containers. During the second half of the trip we saw Peregrine Falcons, which were truly rare in the lower 48 during the 1980s because of the effects of DDT, as well as a Long-tailed Duck on a tundra pond, and Long-tailed and Parasitic Jaegers, which flew at us aggressively when we got too close to their nesting grounds.
Hiking further, we approached our destination, Kurupa Lake. Denis didn’t tell us at the time, but later said an early oil prospector’s report described the “herds of Grizzly Bears” at Kurupa Lake. Fortunately, we encountered no herds, but we did see a second Grizzly Bear on the other side of the lake, where it paused to furiously dig up an Arctic Ground Squirrel’s burrow. It is astounding how fast those massive muscles and claws allow a Grizzly to dig. We assumed it got the squirrel.
We stayed two nights at our last campsite, giving the bush plane plenty of time to retrieve us. While we waited, Karen and Denis both fished, each catching a Lake Trout and observing Arctic Char. Denis released his fish, but Karen was determined to eat ours. So we cleaned the fish and boiled it, tossing the carcass into the lake to reduce the scent. It was good, but the scent from the cooking would have clung to our wool clothing, undoubtedly acting as a lure for a bear. Fortunately we didn’t attract any bears to camp.
There was always a chance the plane would not appear on our pickup date; if fog or other bad weather delayed previous days’ retrievals, people would be picked up in order and they would get to us as soon as possible. We were getting low on white gas and food and speculated that if we were delayed by days we would be eating raw fish.
We were entranced by the whole experience, and Lee could have turned around and stayed in the wilderness for another two weeks if we had the time. Alas, work called and we needed to return. On our last day we needed to pack early and have our gear ready to go. In the afternoon we heard the whine of a plane approaching, and it turned and descended to our lake. The pilot had instructed us to leave a tent up so he could spot us along this large lake. As soon as we knew the pilot had spotted us, the tent was quickly collapsed and we hoisted our packs to trudge down to the shore, then loaded our gear onto the float plane. When we took off, it signaled the end to one of the signature experiences of our lives.
The photographs below show a map of our route, final packing on the runway in Bettles, our flight north through the mountains, and our first moments on the arctic tundra. Click on any of the pictures for a larger view and more information.
As we hiked across the tundra with our heavy packs, the Arctic revealed itself in beautiful wildflowers, distant views, Caribou antlers, fast streams, and campsites with glorious views.
We identified and photographed wildflowers and lichens and ferns that we had never before seen. The tundra plants are short, hugging the ground to stay out of the wind and take advantage of the warmth near the ground; most of the wildflowers are pollinated by flies, since bees are scarce in the Arctic.
When we reached the end of a long valley and several days of warm temperatures, our route next led us into the mountains. After setting up camp, rain turned to snow. After a rest day, we climbed steeply up into the mountains, not knowing if we could cross the range here. It turned out that we could, although there were challenges of negotiating ice and snow and a steep scree slope.
After the steep mountain crossing we hiked down a long valley in rain and snow, passing alpine lakes and crossing a stream. Here our wildlife sightings began in earnest, with Grizzly Bears, Caribou, Dall Sheep, and birds we had never seen before. Seeing thousands of Caribou was a highlight of our lives.
After all our time in the wildest wilderness we had ever experienced, it was time for a float plane to pick us up at Kurupa Lake on the north side of Gates of the Arctic National Park. We arrived two days early and spent the extra time fishing and hiking. Alas, we heard the plane overhead and quickly packed up, ending one of the premier adventures of our lives.
Wilderness and adventure in far off places would lure us to distant locations and backpacking trips during the ensuing decades, but nothing would be quite the challenge as this trip to the Brooks Range. Looking back now, nearly four decades later, we both think of it as a highlight of our lives.
Lee Rentz Photography Journal 