Jeff Vanuga / Bison (Bison bison) crossing Nez Perce Creek in early morning fog, Yellowstone National Park, Wyoming. September.

Phil Savoie / Cliff swallow (Petrochelidon pyrrhonota) in flight carrying nesting material, Nez Perce Creek, Yellowstone National Park, Montana, USA, July.

Michael Durham / Tipi frames under the Milky Way from a Nez Perce encampment, Big Hole National Battlefield, Montana

Michael Durham / Teepee frames under the Milky Way from a Nez Perce encampment, Big Hole National Battlefield, Montana

Michael Durham / Technical supervisor for the Nez Perce Department Of Fisheries Resources Management holding an adult Three toothed / Pacific lamprey (Lampetra tridentata) before placing it in a holding tank. The Colu...

Michael Durham / Pacific Lamprey (Petromyzon tridentatus) held by recently deceased Elmer Crow Junior, a Nez Perce elder and technical supervisor for the Nez Perce Department Of Fisheries Resources Management, Washing...

Michael Durham / Pacific Lamprey (Petromyzon tridentatus) held by recently deceased Elmer Crow Junior, a Nez Perce elder and technical supervisor for the Nez Perce Department Of Fisheries Resources Management, Washing...