Winter Escapades: Embracing a Versatile Winter Wonderland
By Olivia Maclean
As winter blankets the landscape with its pristine coat of snow, adventurers of all kinds eagerly await the opportunity to delve into the snowy wonderlands. Weather-conscious locals make the most of new snow and blue skies as the parking lots along Wolf Creek and Molas Passes fill with visitors from afar who have been tracking the most recent storm; each snowfall a fresh invitation to explore.
For skiers, the season heralds endless opportunities to carve powder-laden slopes and explore the serene beauty of the snow-covered San Juan and Rio Grande National Forests. From the adrenaline rush of downhill descents on Lobo Overlook to the tranquil solitude of Nordic trails at Big Meadows or Fall Creek, each outing offers the pure essence of winter.
Snowshoers, too, find their winter haven amidst the serene landscapes of the National Forests. Their snowshoes allow them to tread softly over the deep snow while witnessing the undisturbed wildlife and the intricate frost patterns across the landscape.
Snowmobilers from across the country keep a vigilant eye for snowfall to have a chance at cruising across vast expanses of Wolf Creek Pass with their machines; winter provides a playground waiting to be explored. While skiers, snowshoers, and snowmobilers share a passion for exploration, conflicts sometimes arise. Skiers and snowshoers, accustomed to the tranquility of gliding through the snow under their own power, may find the roar and tracks of snowmobiles disruptive to the experience. Likewise, snowmobilers, who relish the freedom to roam, are irritated at the thought of their terrain being diminished.
Yet, skiers, snowshoers, and snowmobilers share a common bond—a deep appreciation for the beauty and grandeur of the champagne powder of Colorado. The majority of motorized and non-motorized recreationists understand the importance of responsible recreation, respecting the ecosystems that they traverse and minimizing their impact on the environment.
The San Juan Mountains Association (SJMA), in partnership and with support from the San Juan and Rio Grande National Forests, has employed two snow ambassadors this winter. Colin Courtney has been stationed at the Andrews Lake parking lot, where SJMA has been stationed for the 3rd consecutive winter season, and Olivia Maclean has served as our inaugural Snow Ambassador at Wolf Creek Pass.
Throughout the winter, SJMA offers educational programs centered on understanding our wintry world better. SJMA Snow Ambassadors have interacted with more than 2,300 winter recreationists – both motorized and non-motorized – to ensure that they understand daily avalanche and weather conditions and the importance of recreating responsibly. This partnership is essential in nurturing mutual respect among all individuals dedicated to maintaining unrestricted access to National Forests no matter how they enjoy the region’s vast public lands.
Many of us share a common love for the winter landscape. By recognizing and respecting each other's preferences and adhering to established trail guidelines (set in place by the respective Forest Service), skiers, snowshoers, and snowmobilers can coexist harmoniously, ensuring that everyone can enjoy the splendor of this region’s snowy wonderland in their own ways.
Olivia Maclean, SJMA’s Wolf Creek Snow Ambassador, cherishes both backcountry skiing and snowmobiling.
- Published in Stewardship, Winter
Snow fatigue is reminder of mountain’s benefits
By Hannah Green
I stand on the edge of the Wilderness as the late afternoon glow hits the peaks. Clouds hug the tops of the mountains signaling the incoming storm. The wind is cold, and the snow blows across the peaks in delicate wisps. It has felt like a long winter, with weekly storms and more recently lots of wind. Durango Weather Guy calls it “snow fatigue” but in moments like these, deep into winter, the snow and its beauty are undeniable and not to be forgotten when the next blizzard hits.
As the Snow Ambassador for San Juan Mountains Association (SJMA) this winter, I’ve watched hundreds of people take off into the hills around Andrew’s Lake. For some it is their first time out in the backcountry in winter and others have lost count. But no matter their level of experience they are just happy to be outside. Since visitation to the San Juans doesn’t stop during these snowy days, neither does SJMA’s outreach and education efforts. My role is to provide visitors with forest and backcountry information from winter recreation opportunities to daily CAIC avalanche forecasts. Most people are just wondering where to go, some are interested in what I’m doing, but most people, especially outside of the parking lot, are just looking for some quietude or a chance to catch up with a companion.
I hear the word “playground” used a lot to describe the mountains and the word “playing” to describe our connection to these places, but I think in many ways those words degrade the importance of this land and of our responsibility in protecting it. This isn’t a playground, but the lifeblood to the four corners. Without the snow to fill the headwaters of our rivers, we, as a species, wouldn’t be able to survive here. After all, the water that fills our cup and keeps our gardens alive comes from high in these peaks.
It’s easy to become apathetic these days but when I ask myself what else I can do to help the aching planet, the only answer is to show people the beauty of these mountains. We all together have to be stewards of the land. This is not just my job, it’s everyone’s who steps out into these mountains.
I’ve criss-crossed the San Juans many times by foot: long ridgelines, big peaks, even bigger fields of wildflowers, and hundreds of miles of untracked snow across the wilderness; and have developed a relationship with the topography akin to the closest friendship. Through the highs and lows of life the mountains continue to inspire and motivate me to keep moving forward. This land gives me so much- and in an effort to not just take from it-I hope I can give back by helping people find their own relationship with this landscape.
And back to all the snow this season, if you too are experiencing snow fatigue right now just remember that the spring skiing, river season, and wildflowers come July will be incredible. The snow will keep us afloat for another summer as our climate changes and our weather systems vary greatly. A reminder to myself that we are lucky to have such regular storms and they will surely blossom into a magical summer.
Hannah Green is the Snow Ambassador for San Juan Mountains Association.
- Published in Stewardship, Winter
Wrapping Up a Solid Year
Anticipation hangs heavy in the air at this time of year. We see it in the faces of all the children (and adults, too) who visit the Christmas Tree lot, selecting the perfect tree to adorn their house for the holiday season. We feel it as we look to our favorite weather apps, hoping to see the promise of accumulating snow and the adventures it beckons and the impact on next year’s growing season. And those of us associated with non-profit organizations and small businesses feel it as we look at our financial statements and the calendars marking the end of the year, hoping that we close out the year strongly.
At the San Juan Mountains Association (SJMA), we have also spent time reflecting on a solid year. The SJMA staff work hard to fulfill our mission to empower residents and visitors to the San Juan Mountains to explore them responsibly, learn about them more deeply, and to join us in protecting them for future generations. In summary:
- SJMA hosted more than 190 distinct educational programs this year, including widespread return to school-based field trips and full-capacity summer camps. Many third-graders experienced their very first field trips with SJMA, highlighting just how abnormal the past several years have been.
- Our visitor information specialists worked diligently to provide information and resources through thousands of phone calls and walk-ins – even though the public lands offices still operated under variable schedules due to COVID-19.
- SJMA’s seasonal stewardship crews – including the Wilderness Crew and Snow, Forest, and Alpine Loop Ambassadors, engaged with nearly 20,000 visitors over the entire calendar year, providing them with information on how to recreate responsibly and protect the public lands we all love.
- After Outdoor Research sold the iconic tiny home that has served as SJMA’s basecamp for stewardship efforts at locations such as Ice Lakes, Molas Pass, and Lizard Head Pass, we purchased an off-road utility trailer that is currently being modified to serve as SJMA’s mobile basecamp, version 2.
We collaborated not only with federal land management agencies throughout the region, including the San Juan, Rio Grande, and Uncompahgre National Forests, and the Bureau of Land Management, including Canyon of the Ancients National Monument, but also with a number of other non-profit partners, including Mountain Studies Institute, La Plata Open Space Conservancy, Southwest Conservation Corps, and Companeros. Partners only strengthen our efforts.
I’d be remiss if I didn’t highlight one of our most valuable resources – all of you who have supported SJMA’s efforts through your time and your gifts. Hundreds of you have supported us financially and contributed thousands of hours to assist with SJMA’s myriad activities. Whether you have volunteered to help with our children’s enrichment programs, interacted with visitors at popular trailheads, spent a long weekend at the Chicago Basin basecamp, adopted a section of one of the many forest roads in the region, conducted solitude monitoring throughout our Wilderness areas, helped greet visitors at the public lands offices, served on our board of directors, or assisted with the Christmas Trees for Conservation lot, all of us at SJMA recognize your contributions, and we know that we are stronger and more effective as a result.
As we come to the end of 2022, all of us at SJMA can’t help but be filled with gratitude for our partners and supporters, and we look to 2023 with great anticipation for more opportunities to work with you to care for the public lands we all love.
Stephanie Weber is the executive director of the San Juan Mountains Association.
- Published in Education, Stewardship, volunteers, Winter
Stewardship through the Seasons
By Cassidy Storey
It is (another) radiant bluebird day in the San Juans, and thirty people are strapping on snowshoes in preparation for San Juan Mountains Association’s third interpretive ski and snowshoe tour this winter. We have another full crowd ready to explore the powdery landscape, learn the story of the snowpack, and connect with fellow winter recreation enthusiasts. We are thrilled with the turnout and invigorated by the energy buzzing through the parking lot just north of Andrews Lake.
This is the latest success in a transformative year for SJMA. Since last Spring, we’ve exponentially expanded our stewardship and conservation efforts in the region. You may have run into one of our Forest Ambassadors on your favorite San Juan National Forest trail last summer, or volunteered at our biggest Christmas Trees for Conservation lot yet. Perhaps you were one of those thirty participants at the last Après Ski Science & Social or you joined us for a full moon hike beneath the Twilight Peaks. One thing is certain, we are increasingly energized in our goal of empowering people to explore, learn about, and protect the San Juan Mountains and public lands of Southwest Colorado.
There’s a lot to look forward to as our days noticeably get longer and warmer. Starting in May, SJMA’s Forest Ambassador crew will be returning to the most popular trails in the area while the Wilderness Stewardship Crew will work on improving the backcountry for users of all kinds.
Using the momentum we built this winter through our school field trips, interpretive events, and Snow Ambassador program, we’re making big plans for summer. You will have the opportunity to join us for volunteer-guided naturalist hikes, forest ecology tours in Montezuma County, and special interpretive events throughout the season to learn more about our beloved San Juans.
Our plans now will result in a summer season filled with learning, adventuring, and connecting as public lands stewards. We hope to increase responsible recreation in these special places and inspire appreciation for their existence and benefits. By creating engaging interpretive events, we aim to draw in visitors and locals, capture a curiosity, develop an interest, and leave our guests with an undeniable sense of place and a little bit more knowledge than they had before. For nobody will protect a place they do not care about, and nobody will care about a place they do not experience.
As winter comes to a close, there are still two more opportunities to participate in our popular Après Ski Science & Social. Join us on Saturday, March 12th, for the interpretive tour featuring Joe Grant, local ultra runner, Protect Our Winters Ambassador, and San Juan Mountain aficionado. We look forward to enjoying the San Juans’ finest powder, learning about the importance of our mountains’ snowpack, and hearing about how Joe came to be concerned with the precipitous decline in snowpack we’ve seen over recent years. We’ll wrap up this series on March 26th.
Stay up to date on all of our interpretive events by visiting sjma.org/events or signing up for our e-news at the bottom of our homepage. You can also find the latest on all our work by following us on Facebook and Instagram.
Cassidy Storey works as the Community Outreach Specialist and Forest Ambassador Field Manager for San Juan Mountains Association and is looking forward to another successful summer field season.
- Published in Education, Stewardship, Winter
San Juan Mountains a laboratory for the study of avalanches
By Alex Miller
The San Juan Mountains Association works in partnership with our federal public lands partners to ensure that visitors to our mountains can continue to enjoy the grandiose viewsheds, beautiful hiking trails, world class off-roading, designated Wilderness Areas, and incredible winter recreation opportunities that make this area great.
Along with these claims to fame, the San Juans are also known for the huge number of avalanches they produce in the winter. Avalanches are cascading piles of snow, ice, and debris that occur on slopes steeper than thirty degrees. They require snow, which we often have here, and mountainous terrain, which we always have. Though only a winter hazard, avalanches are responsible for killing numerous backcountry travelers each year. Luckily, some wonderful resources can help visitors to southwest Colorado stay safe this winter. The Colorado Avalanche Information Center (CAIC) and the San Juan Mountains Association’s public lands stewardship programming both strive to inform winter recreationists on how to stay safe and recreate responsibly this winter.
Before the Rocky Mountains were so densely settled, mining town residents observed avalanches and developed local knowledge to avoid perishing in them. Greenhorns were filled in on how to survive their commutes to the mine, and when disaster struck, whole communities participated in rescue efforts (Di Stefano 2015). With the advent of winter recreation after World War II, local avalanche knowledge rapidly developed into a field of research with help from the US Forest Service and ski areas they managed (National Forest Foundation 2015). As the field grew, so too did the research locations, and what better place to study avalanches than the San Juan Mountains.
Several prominent avalanche researchers worked in the San Juans from the 1970s onward through the Institute of Arctic and Alpine Research’s (INSTAAR) San Juan Avalanche Project (INSTAAR History). The project’s goal was to study what caused so many avalanches here and how to mitigate the hazard they created along HWY 550. Researchers brought their avalanche experience to Silverton and, in the tradition of their mining predecessors, developed a strong, localized understanding of avalanches. This time, their local knowledge contributed to a broader community of avalanche researchers across the world and was informed by decades of scientific discussion. Between local observations and universal knowledge, INSTAAR researchers could more accurately predict when to close HWY 550 and similar mountain highways. Thus, the San Juans became not only a hub for avalanches, but a hub for their study.
After an avalanche buried and killed HWY 550 snow plow driver Eddie Imel in 1992, CDOT began sponsoring the CAIC, an organization responsible for studying and forecasting avalanche conditions throughout the state (Knox Williams 2020). The CAIC draws from the pool of knowledge established in mountains around the world, pairs it with local observations from individual mountain ranges like the San Juans, and spreads information in digestible ways to residents like you and me. For winter recreationists, checking the CAIC avalanche forecast is the first step to a fun day in the mountains. By providing this important information, the CAIC and avalanche researchers around the West are playing a vital role in helping visitors to the San Juans have safe, enjoyable trips into the mountains.
Through our winter programming and snow ambassador program, the San Juan Mountains Association is also doing its part in showing residents and visitors how to recreate responsibly in the snow. This winter, join us on one of our Full Moon Howler trips (hosted by the Durango Nordic Center), our bi-weekly Aprés Ski Science & Socials on Saturday afternoons outside the Outdoor Research tiny house north of Andrews Lake, or say “Hi” to our snow ambassador John next time you’re out for a ski tour near Molas Pass.
Alex Miller is the Montrose Public Lands Ambassador for the San Juan Mountains Association.
- Published in History, Stewardship, Winter
The Mountains Are Calling
Nick Keeler
The winter season in Southwest Colorado is one of beauty, change, quiet and inspiration. It is difficult to imagine a more picturesque winter mountain setting than what each one of us is blessed with on a daily basis. People from across the country travel here to experience the aesthetic beauty possessed by the mighty San Juan Mountains. When the snow has fallen and many trails, peaks, and alpine lakes seem inaccessible, know there are safe locations to travel to and different methods to reach those special places.
The informed winter enthusiast must always consider the topography and potential for avalanches, current snow condition, future weather possibilities, and have the proper gear and the knowledge of its use. Even when all of these factors are prepared for, during certain weather conditions there is always the potential of avalanche danger. Remember this simple but important truth, “Enough snow to ride? Enough snow to slide.”
While we don’t want to deter folks from getting out in the snow, the winter recreationist should know the potential for danger if the proper precautions are not taken into account. Any number of different “gear lists” can be found on-line for different occasions; some essentials to bring on your San Juan adventure include: at least one detailed map of the area, a compass, extra warm clothing, a warm blanket (in case of an unplanned overnight stay), flashlight or headlamp, pocket knife, first aid/survival kit, extra nonperishable food, and more water than you think you would need. The San Juan National Forest offers a free winter guide/brochure, “Where to Go in the Snow, on San Juan Public Lands”, which includes a gear list as well some avalanche awareness and survival tips.
Purgatory, Hesperus, Telluride, and Wolf Creek are good options to downhill ski and snowboard, but where would a person go in the San Juans if they were looking to walk a trail, snowshoe, cross country ski (XC ski), or snow-bike? Haviland Lake about 17 miles north of Durango offers a wonderful winter trail system. This is an area with minimal avalanche danger, a well-established and maintained trail system, it is right off Highway 550, and no major mountain pass prevents its access. Are you looking for more snow and a higher elevation experience? A little further to the north past Purgatory lies the Molas Pass Winter Recreation Area. If the snowpack is minimal, or there is an early or late season urge to snowshoe, Molas Pass is where to go. Just to the south of Silverton off Highway 550, at an elevation of 10,910 feet is where you will find this gem. There are 200 acres designated specifically for non-motorized use, which allows for more of a wilderness experience and provides a safer environment for all.
Closer to Cortez and Dolores there are some good prospects to be explored. Just north of Dolores is the Boggy Draw trail system, which functions as a snow-bike and snowshoe trail system in the winter months. Closer to Mancos is the Chicken Creek XC Ski area, which provides another nicely groomed trail system with the emphasis here being on cross country skiing. These areas near Dolores are a bit lower in elevation, so if we experience a lack of a winter like last year these locations may not be covered in snow. Up near Lizard head pass next to Trout Lake on the Uncompahgre National Forest is another vast winter playground to explore. Cross country skiing, snowshoeing, snow-biking, and snowmobiling each can find a home here at 10,222 feet on Lizard Head. The trail destinations mentioned in this article have been selected because they generally do not exhibit extreme avalanche danger. However safety and preparation are ultimately up to the user, one must “know before you go”. For more information about winter safety and recreation please visit or contact the San Juan Public Lands Center at 15 Burnett Court in Durango or (970) 247-4874. The Public Lands Center contains one of our bookstores for the San Juan Mountains Association; we have an assortment of guide books and maps available, along with first-hand knowledge and information to benefit any winter recreationist.
The snow covered peaks of the San Juan Mountains are sure to inspire and charm, but must also be respected. The solitude one can find in these mountains is utterly remarkable, there is an entire outdoor recreation industry in the Four-Corners which can attest to that. Even in winter, John Muir knew exactly what he was saying, “the mountains are calling, and I must go.”
Do not disturb wildlife during the cold winter months
What an amazing mid-winter thaw! All this warm weather makes it hard to remember the preceding cold and snowy months of January and December and even early February. The deep snow and bitter cold have made this winter extra tough and stressful for local wildlife.
While some animals are hibernating and others have migrated to warmer latitudes, those that have adapted to tolerate the winter have to work harder to stay alive.
Tolerating wildlife have a variety of techniques for surviving the winter. One technique is to yard up. Deer often do this in the deep snow. They create a small network of trails and sleeping areas. They do not stray out of this area into the deep snow, even if they see other food nearby. To do this would risk too much energy. In a particularly harsh winter, animals may run out of food in the yarded area.
As a result of the harsh winter, there will be more winter kill among local wildlife this year. Although this is all part of nature, one can’t help but feel a little sad about starving and frozen critters. The Durango Herald reported back in January that Durango locals have spotted many carcasses near town and even seen mountain lions feeding.
But it doesn’t have to be all doom and gloom. There are measures you can take to help wildlife make it through the winter.
Respect wildlife closure areas. Both the Bureau of Land Management and Colorado Parks and Wildlife manage seasonal closures of public lands. These closures prohibit public access in order to create a less stressful environment for wintering animals, or in some cases, nesting raptors. Starving animals conserve calories by moving as little as possible. Human encroachment from foot travel, biking, motor vehicle use and dogs – even on a leash – can startle wildlife and cause animals to run, therefore using valuable energy stores.
For more information about winter closure areas in Southwest Colorado, including maps, contact the BLM Tres Rios Field Office in Dolores at 882-7296 or Durango at 247-4874, and the CPW Durango office at 247-0855.
Minimize Impact Elsewhere. Animals that live near paved roads, populated areas and ski areas are habituated to noisy humans and are not as stressed by startling sounds. However, winter recreationists – skiers, snowshoers, fat bikers, snowmobilers and even ice climbers – who venture miles away from civilization pose a threat to the survival of wintering animals.
There are a number of studies out there that weigh the effects of noise from different types of human travel in winter. One study showed that deer are more startled by people on foot than snowmobiles. However, snowmobiles do have a greater impact in one way – the weight of snowmobiles causes the snow to collapse, destroying the subnivean underlayers needed by small mammals to survive winter – subnivian meaning “under the snow.” These subnivian creatures create a network of tunnels in the snow and create food caches. It is often much warmer under the snow than out in the open.
Owls are also suffering during this harsh winter. A study on the northern spotted owl showed that a visual disturbance from as far away as 100 meters can disturb the owls.
If you read the Feb. 14 Herald article about the tough winter for wildlife near Glenwood Springs, you are familiar with the fact that there has been an unusual number of dead owls this winter.
This was attributed in part to a lack of small animals above the snow, but human encroachment can also play a part.
So when going into the winter backcountry, think about the creatures that live out there and tolerate the weather all winter long. We humans can choose a warm bed at night, whether we tolerate by heating our house or migrate to southern Arizona and camp out where it is warm.
By MK Gunn
Slippery Ice
As we have experienced in our area recently, ice is a reality in winter. Watching out for ice on the roads and sidewalks practically becomes second nature this time of year, not to mention falling icicles from rooftops! Let’s explore ice properties a bit more – ready for an easy chemistry lesson?
Ice is solid water. In fact, there are 14 known solid phases! Commonly used, the term “ice” refers to the most abundant phase, ice Ih. It is a crystalline solid that you can see through or may be blue-white depending on what is in the air. The addition of materials changes the appearance of ice (particles, sand, dirt, salt, etc). Ice is formed when liquid water is cooled below 32 degrees Fahrenheit or zero degrees Celsius.
When solid, ice is a mineral of hydrogen oxide. Ice is unusual in that it is the only non-metallic substance that expands when it freezes. The solid state of ice is eight percent less dense than liquid water, which is why ice floats. This is an important factor in Earth’s climate – if ice sank, the entire body of water would freeze, killing practically everything in it. The water molecules in ice are packed close together, preventing it from changing shape. Ice has a very regular pattern with the molecules connected by the hydrogen bonds that form a hexagonal pattern. These crystals have a number of open regions and pockets making ice less dense than liquid water. Since ice has a lower density than water, pressure decreases its melting state and can force ice back into liquid water. In the past it was believed that slippery ice is caused by a thin layer of melted water on the ice, due to pressure. Many scientists now believe that the ice molecules that are in contact with the air cannot bond with the molecules of ice beneath – the transition molecules are in a somewhat-liquid state and act as a lubricant. This is not always the case – the extreme South Pole conditions do not make ice and snow slippery.
Ice, snow, hail, frost, and polar ice caps are examples of water in its solid state. Liquid water freezes at 0 degrees Celsius. The ice can then either stay frozen, melt as temperatures climb, or sublimate, turning directly into a vapor. Sublimation occurs naturally with strong sunlight, winds, low relative humidity and low air pressure. It also occurs in frost-free freezers with a fan and air circulation, which keeps a low relative humidity. However, ice cubes also sublimate in this environment, so they may need to be replaced regularly.
Some interesting ice facts:
- 68.7% of the fresh water on earth is stored in ice caps, glaciers and permanent snow
- Glacial ice covers 10-11% of all land.
- 99% of the ice in the world is found in Antarctica and Greenland
- Ice can create erosion by water seeping into rocks and cracking them open when it freezes and expands.
- “Black” ice can form on lakes as well as roadways, and occurs when the ice forms 6-sided, vertically organized columns with few air bubbles. The ice is transparent, and when on roadways looks simply wet, instead of the slippery stuff it is.
Now that you’ve had your chemistry lesson, go out and enjoy your winter, walk carefully, and watch out for that black ice!
By Gabi Morey, Education Outreach Director
- Published in Winter
Life Beneath the Snow and Ice
Winter in southwest Colorado is finally here! In this weather our local animals have many survival strategies – they may migrate, hibernate, or adapt their lives to the new surroundings. However, some of the most fascinating animals are those that manage to survive while remaining underneath large amounts of snow throughout the winter. Their environment is called the subnivian zone, meaning “under snow”.
When the temperatures get frigid outside, a deep layer of snow – about 10 inches or so – can act as an insulating layer to animals beneath it. The warmth here actually comes from the Earth’s core. The snow at the bottom of this layer changes form, and becomes ‘sugar snow’, or depth hoar, where the flakes don’t stick together very well. This is a benefit to small animals who can then move through it easily. Some of the most common animals that can be found under the snow are mice, voles and shrews. They burrow under the snow, finding seeds, stems and even beetles and larvae to eat. Some of the plants they find to eat even manage to stay green and growing during the winter. The small mammals living here make an amazing network of snow tunnels, and even create air shafts to get oxygen. However, it is typically very dark under the snow, making eyesight a secondary sense to these animals. Whiskers help profusely to help them find their way through the network of tunnels.
Despite these small mammals seeming to be well hidden under the snow, predators such as ermine, owls, foxes and coyotes are aware of their presence. Ermine, or long-tailed weasels, are small and thin enough to actually enter the tunnels, while larger predators appear from above, diving snout first (such as with coyotes and foxes) or feet first (such as with owls and other raptors) to grasp their prey. When you’re out this winter, look for the beautiful wing prints that owls and other raptors leave in the snow when capturing their prey.
Animals even smaller than mice manage to live under the snow as well. This includes mites, springtails and spiders. Springtails, which are small insects that can spring themselves into the air can actually be seen above the snow as well on warmer winter days, and are a great food source for the spiders under the snow. In order to survive under the snow some spiders and insects produce a sort of antifreeze in their bodies which prevents ice crystals from forming.
Things also change for animals and plants beneath the ice in the winter. Water beneath the ice doesn’t freeze, but it still remains extremely cold – usually in the mid-‘30s. Actually, the main problem for animals down there is not the cold, but the lack of oxygen in the water. During the rest of the year oxygen is added to the water through air and water currents, waves, and plants photosynthesizing. In the winter, none of this happens. Animals that live beneath the ice are cold blooded, meaning their body temperature is the same as their environment. Thus their metabolism slows down, as do their movements – some even become dormant. In this way they need less oxygen and food through the winter.
When outside this winter, you can experiment with your own ‘subnivean zone’ by creating a snow shelter, sometimes called a quinzee. These need to have quite thick walls (1 – 2 feet) to work best, but once you’ve built it you can even sleep in it at night! Or, if sleeping in the snow isn’t your thing, enjoy having a hot chocolate in front of the fire and give a thought to the animals and plants surviving the season outside in the cold.
By Gabrielle Morey, SJMA Education Outreach Director