The avian community of Big Hole National Battlefield is as rich and as varied as the landscape it occupies. The Park serves as a permanent home to many bird (wi’twit) species, a summer breeding area for others, a place to rest and refuel for long-distance migrants, and a place for some species to spend the winter.
Over 80 species of birds were recorded n a 1999 bird inventory at Big Hole National Battlefield. Two winter residents of note recorded in this study were the American tree sparrow (Spizella arborea) and the common redpoll (Carduelis flammea). Other species of note include: bald eagle (saqanta’yx, Haliaeetus leucocephalus), rough-legged hawk (Buteo lagopus), northern pygmy-owl (Glaucidium gnoma), long-eared owl (Asio otus), Hammond’s flycatcher (Empidonax hammondii), and Say’s phoebe (Sayornis saya). In addition, the presence of black-billed magpie (Pica hudsonia) is likely associated with adjacent ranch lands.