The pygmy rabbit (Sylvilagus idahoensis) is markedly smaller (22 to 28 cm; 0.2 to 0.5 kg) than the eastern cottontail (Sylvilagus floridanus), lacks a conspicuous tail, and is considered by some to be a distinct genus (Brachylagus). Its range is limited to several western states, where it inhabits clumps of tall sagebrush. It is mostly nocturnal.