Arctic Grayling

Thymallus arcticus

Predicted Distribution Loss by End-of-Century:
51%

MT Conservation Rank:
S1 (Critically Imperiled)


Synopsis: Arctic Grayling were historically present throughout the upper Missouri River basin of Montana and Yellowstone National Park, but are now restricted to ~20% of their historic range. All native populations are in decline. Climate change is expected to further reduce this extent.