The Tobacco River Watershed, a primary tributary to the Kootenai River, provides some of the most important spawning and rearing habitat for bull trout and westslope cutthroat trout in the lower 48 states. Grave Creek, a tributary to the Tobacco River, has been identified as the most important spawning tributary in the United States portion of the Upper Kootenai. The Kootenai River Watershed also supports populations of redband rainbow trout, kokanee salmon, and white sturgeon. Other wildlife Species of Special Concern include: grizzly bear, gray wolf, Canada lynx, wolverine, fisher, bald eagle, peregrine falcon, Columbian sharp-tailed grouse, and over 190 species of migratory birds.