Why settle for just a month to go wild over contests between say, wildcats and wolverines, or pairs of other would-be animal champions?
In the National Wildlife Refuge System, celebrating its 115th birthday on March 14, you can root for your animal favorites year-round. Who gets your vote in the Mammal Madness fantasy contests in this photo-essay?
Top: A polar bear and her cub share a moment at Arctic National Wildlife Refuge in Alaska. Bottom: A Kodiak brown bear and her cub play at Kodiak National Wildlife Refuge in Alaska. (Photos: Cameron Teller/Share the Experience; Lisa Hupp/USFWS)