photo credits clockwise from upper left:

gray wolf, Yellowstone National Park (YNP)
marten, Dan and Cindy Hartman
mountain lion, Jim Dutcher
Canada lynx, Idaho Fish and Game Department
Northern goshawk, M.A. Kielb
wolverine, Daniel J. Cox
grizzly bear, YNP
ferruginous hawk, unknown
swift fox, Franz Camenzind
burrowing owl, Jim Brandenburg
coyote, Russell Graves
fisher, Alan and Sandy Carey
black-footed ferret, Tim Clark
black bear, Steve Gehman