Yellowstone Cutthroat Trout
Yellowstone cutthroat trout (Onchorhynchus clarkii bouvieri) are considered a keystone species in Yellowstone National Park. They provide a source of food for an estimated 42 species of birds and mammals including grizzly bears, osprey, and bald eagles, and in the recent past, supported a major sport fishery. Genetically pure Yellowstone cutthroat trout populations have declined throughout their natural range in the Intermountain West, succumbing to habitat degradation, angling harvest, competition with and predation by non-native fish species, and a loss of genetic integrity through hybridization. Many of the remaining, genetically pure Yellowstone cutthroat trout are found within Yellowstone National Park.