Other mammals include the black bear, elk, moose, mule deer, pronghorn, bighorn sheep, mountain lion and wolverine. Bald eagles, falcons and hawks are just a few of the 300 species of birds known to inhabit the region. The streams and lakes are home to Yellowstone cutthroat, rainbow, brook, brown, lake, and golden trout—about 2.5 million of which were stocked by a local explorer named Finis Mitchell and his wife during the Great Depression.