For a small park, Bryce has several types of habitat and is home to over 70 mammal species, 17 reptiles and amphibians, as well as over 200 species of birds. Many of these species are either migratory or hibernate in winter. Mule Deer and Pronghorn migrate to lower elevations where food is more readily available. Utah Prairie Dogs, chipmunks, and ground squirrels hibernate from late October until March. A few birds, including Bald Eagles, are seen at Bryce Canyon only in winter, while a few hardy bird species, including White-breasted and Pygmy Nuthatches, Common Ravens, Steller's Jays and Clark's Nutcrackers, live in the park all year. Though wildlife watching at Bryce in winter is challenging, it never hurts to look. If luck is on your side, you may be fortunate enough to catch a glimpse of a Long-tailed Weasel in its snow white winter coat with a black-tipped tail.