Last week I wrote about how some animals like voles, mice, and shrews utilize subnivean habitats as a way to stay warm and avoid being seen by predators while they forage.
Of course, predators need to eat too. And while the snow allows the rodents to stay out of sight, there are several predators such that have developed other ways of finding their prey. For example, weasels (especially ermines) will dig down through the snow to look for rodents and their subnivean tunnels. Sometimes they will even take over the tunnels and make them their own after they’ve preyed upon its original inhabitants.
There are also several predators such as owls, foxes, and coyotes with such excellent hearing that they actually listen carefully for squeaks and sounds of movement under the snow before ambushing their prey. Red foxes, for example, can hear very low-frequency sounds, enabling them to hear rodents scampering beneath several feet of snow. Scientists also believe that foxes tune in to the Earth’s magnetic field to hunt: as a fox follows the sound of its prey beneath the snow, it’s searching for the “sweet spot” where the angle of the sound matches the planet’s magnetic field.
Foxes can be especially fun to watch as they jump high and then dive headfirst into the snow to catch rodents. The clip below, from The Discovery Channel’s North America series, is an entertaining example of this behavior.
Have you ever seen predators hunting for prey under the snow? We’d love to hear your stories in the comments below.
https://tandemglobal.org/wp-content/uploads/2014/02/Ermine-in-snow-NPS.jpg598800Colleen Beatyhttps://tandemglobal.org/wp-content/uploads/2025/02/tandem-global-logo-exp.svgColleen Beaty2014-02-13 08:07:242023-11-28 11:18:27Wildlife in Winter: Catching Prey Under the Snow
Here in the Mid-Atlantic region, we’ve been experiencing snowfall on almost a weekly basis for the last month or so. And while all this snow causes school shutdowns and traffic headaches for us, some of the local small mammals, like voles, mice, and shrews, do very well by staying beneath the snow.
This type of habitat is called subnivean habitat, a word derived from the Latin words sub (beneath) and nives (snow).
Voles, mice, and shrews dig tunnels under the snow, which allow them to travel safely between burrows and food sources without being seen by predators. Snow also provides excellent insulation against below-freezing ambient air temperatures, creating a microclimate near the ground with a temperature closer to 32°F (0°C). The subnivean tunnels only become visible once the snow melts and the tunnels collapse.
There are some great educational activities out there that you can use to teach students about how small mammals and other wildlife use snow. A great one I found is a game called Subnivean Critter Tag, which requires little more than freshly-fallen snow and some imagination.
Have you found any great conservation education activities for the snow? Please share them in the comments below!
https://tandemglobal.org/wp-content/uploads/2014/02/Deer-Mouse.jpg409450Colleen Beatyhttps://tandemglobal.org/wp-content/uploads/2025/02/tandem-global-logo-exp.svgColleen Beaty2014-02-07 11:13:052023-11-28 11:18:04Wildlife in Winter: Finding Cover Under the Snow
Through a special partnership of the Wildlife Habitat Council (WHC), Monarch Watch and the North American Pollinator Protection Campaign, WHC programs in the northeast and Midwest United States may be able to receive free or low-cost seeds, low-cost plugs (small plants) and expert advice on species selection from Monarch Watch Director Chip Taylor. This offer is limited-time and available only in selected states. Click here to view the flyer for details on eligible locations and the upcoming informational webinar. Contact bbtm@monarchwatch.org with questions.
Here’s an idea for a fun Fourth of July activity: plant a patriotic pollinator garden! Many pollinator-friendly plants have red, white, or blue blooms, berries, stems, or leaves. (Click here for a list of red, white and blue plants.) Already have a pollinator garden? Even if it doesn’t have a red, white, and blue theme, you can still use it to celebrate the Fourth of July. Bayer Corporation’s Pittsburgh Site (a 2008 Signature of Sustainability) has multiple pollinator gardens along their nature trail. Each year during the week before July 4th, employees are invited to place small American flags on the garden mounds in recognition of our service members. Tags with the names of family members, friends, or neighbors who are serving or have served in the armed forces are attached to each flag.
What better way to celebrate the United States’ birthday than protecting its national symbol? The bald eagle (Haliaeetus leucocephalus) is an All-American eagle: it is the only eagle species unique to North America. Although populations remain below historic levels, the species has made a significant recovery since over-hunting, contamination, and habitat loss reduced populations to endangered levels (fewer than 500 breeding pairs) in the 1960s. Conservation efforts have allowed bald eagle populations to rebound to more than 5,000 breeding pairs. The major breeding populations are in Alaska and Canada, but significant bald eagle populations occur around the Great Lakes, in Florida, the Pacific Northwest, the Greater Yellowstone area, and the Chesapeake Bay region. Bald eagles are large fish-eating birds of prey, but will also eat smaller birds, turtles, and carrion.
What can you do to help the bald eagle? Protect large trees in mature stands located within half a mile of bodies of water such as rivers, lakes, or bays. This is especially in the parts of North America where bald eagles breed from early spring through late summer. Improving aquatic habitat with structural enhancements and native vegetative buffers will help populations of fish, waterfowl, and shorebirds, which in turn will provide food for bald eagles. Of course, nesting bald eagles should never be disturbed.
For our friends north of the border, independence is celebrated on July 1, Canada Day. Patriotic pollinator gardens can include plants from the list above with red or white flowers, berries, or foliage. Another patriotic planting can include the maple tree, a major symbol of Canada. Maples provide shelter and food for numerous species of wildlife. Many moth species lay their eggs on maples, making them a pollinator-friendly group of trees.
The American beaver (Castor canadensis) is another well-known symbol of Canada. It is the largest rodent in North America and occurs across most of the continent. Before the start of the fur trade, Canada’s beaver population was estimated at six million. As a result of the fur trade, beaver populations experienced a major decline and nearly became extinct in the 1800s. Beaver populations have rebounded since then due to the declining demand for fur hats in Europe.
Beavers often build dams to ensure that the water level around their lodges remains relatively constant. This is also beneficial to other wildlife species. Waterfowl benefit from the increased habitat created by beaver activity. Other species of birds that benefit include great-blue herons, ospreys, eagles, and kingfishers, as well as numerous species of songbirds. Mammals such as otters, minks, muskrats, deer, and black bears all benefit from the increase in foraging habitats that are a result of beaver activity. Numerous species of fish also benefit from beaver activity, including bass, trout, pike, and salmon. Beavers will eat water lily tubers and the leaves and green bark from aspen and willow trees; conserving wetlands and maintaining these species can help support beaver populations. Information about beaver management, including nuisance beavers, can be found in the Wetland Mammals Management Leaflet.
https://tandemglobal.org/wp-content/uploads/2011/06/Patriotic-Pollinator-Garden1.jpg389413Patricia Leidemerhttps://tandemglobal.org/wp-content/uploads/2025/02/tandem-global-logo-exp.svgPatricia Leidemer2011-06-30 18:24:002023-11-28 11:17:27Celebrate Independence Day the Wildlife Way
The IBM Almaden Research Center, located in San Jose, California, is pioneering the design of artificial nest boxes by partnering with a dedicated volunteer.
Steve Simmons of Merced, California, developed a Barn Owl box plan that has been in extensive use throughout the Central Valley after years of experimenting with and documenting the siting, mounting, and design of artificial nest boxes for Barn Owls. As a shop teacher, he organized the student production of over 10,000 Barn Owl boxes, which were sold to local ranchers for pest control. The sales from the boxes provided over $168,000 in scholarship money for his students over a nine-year period. His personal monitoring of Barn Owl boxes (currently 200 annually at 8 sites) has led to an enormous amount of data on year-round behavior, reproductive habits, diet, predators, habitat requirements, and nest box preferences. Mr. Simmons and other volunteers have placed seven Barn Owl nest boxes at the Almaden Research Center, all of which are monitored on a regular basis.