When the Corps of Discovery passed through Montana in 1805 Capt. Meriwether Lewis described a "new kind of white or silvery trout,"-the Arctic grayling, a member of the salmon family that depends on clean, cold-water streams. Montana is now the only place in the lower 48 states with native populations of fluvial (river-dwelling) Arctic grayling. Over time, its historic range has been drastically r...
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