Cute, tiny baby wolves take their first timid steps outside the den, under the watchful eye of mum
Wolves only use dens when they have young pups that are not yet able to travel with the pack.
Wolf dens are usually located near water and dug into well-drained soil on a south-facing slope. They can be dug under a boulder, among tree roots, or in cut banks, hollow logs or other sturdy natural structures. Wolves often enlarge existing coyote or fox dens.
Wolf den entrances measure about 18 inches in diameter. The passageway, which may be straight, forked or hooked, is 4 to 18 feet long with a chamber measuring about 20 inches high by 50 inches wide by 40 inches deep. No bedding is added to the den.
If the den has been used in past years, bones will be scattered about and well-defined trails should radiate from the den. It is common for dens to be reused.