Author: Owen Caldwell

Polar bears stay awake and hunting all winter. Only pregnant females den, and what happens in that snow chamber is not true hibernation.

The Siberian flying squirrel glides 165 ft between trees, eats catkins all winter and can stop a logging plan in Finland. Size, range, lifespan and pet rules.

Five deer species are native to the United States and three more run wild here. Here is how to identify each one by tail, ears, and antlers.

A nocturnal animals list of 25 species, from owls and bats to aye-ayes and luna moths, with where and when to spot each one after dark.

Tree squirrels stay awake all winter, ground squirrels sleep for months. Here is which squirrels hibernate, where the rest go, and how long it lasts.

Jackrabbits are hares, not rabbits. The five North American species, how their ears cool them, what they eat, and why they are not aggressive.

Chipmunks do not truly hibernate. They spend winter in torpor underground, waking every few days to eat from a stored seed cache in their own burrow.

Frogs brumate through winter on pond bottoms, under leaf litter, or frozen solid. Where each species goes, when it emerges, and what to do if you dig one up.

The gray fox is the only North American canid that climbs trees. How to tell it from a red fox, what states it lives in, and whether it poses any risk.

Wild deer average 2 to 3 years while captive deer reach 15 to 20. Lifespan by species and sex, what kills deer young, and the oldest deer on record.