Owls are one of the most fascinating predators in relation to the subnivean zone and one of the factors that make this winter formation so complex. It can also come from outside of the layer, above the snow. Predation in the subnivean zone can come from within, with predators able to follow the tunnels to their prey, such as a weasel or fisher. Subnivean Zone Illustration by Kristin Link (However, the subnivean layer does not cancel out predation for these critters. These tunnel systems allow them to duck down in their winter homes where larger predators cannot fit. Normally, small critters lack winter camouflage against the white backdrop of snow. It also acts as a layer of protection for food stock and from predators. The heat from the ground melts the snow which condenses against the snowpack, forming a thin ceiling of ice. Snow of six inches or more creates a warm climate underneath that acts as a buffer from freezing weather and wind, and its temperature roughly stays around 32 degrees. It is a layer created by snowpack that is beneath (“sub,” Latin for under) the snow (“nix” or “nivis”). That is where the subnivean zone comes into play. But what about the small creatures such as mice and voles that face harsh winter conditions and predators? How do they make it through to spring? We stock up for food, we turn up the heat in our living spaces, or we layer up to stay cozy. Think about how humans prepare for seasonal changes and what we do to stay warm in the winter months. But underneath the snow, a whole other winter world is filled with animal activity that we can’t hear or even really see if you aren’t paying attention. We often look out at snowy white fields and think about how serene and peaceful it looks. One of the winter wonders that has fascinated me most is the subnivean zone that forms for creatures to survive the winter, especially from strong nighttime predators such as the owls. My first winter comes with a plethora of new information that I have never had the opportunity to learn about and see with my own eyes. This winter is my first winter here in Door County, as I moved to Ephraim early last spring. Mating season for owls in Door County occurs in late February to early March, and this Great Horned outside my house is marking its territory while looking for a mate.

It’s nesting season here for the owls, and they are hooting with a whole new set of calls that I love to try and figure out when I am listening late at night. Posted on by Jeanne Farrell No Comments Yet | Posted in Blog įor the last few weeks, I have been serenaded to sleep by the hoots of a Great Horned owl sitting on a branch by my window.

Superpowered owls