Snakes, including the blue racer ("Coluber constrictor foxii") and common garter snake ("Thamnophis sirtalis"), are significant nest predators, taking nestlings and fledglings as well as sick or distracted adults. Likewise corvids such as the American crow ("Corvus brachyrhynchos") and blue jay ("Cyanocitta cristata"), and large climbing rodents, notably the American red squirrel ("Tamiasciurus hudsonicus"). Carnivores, in particular members of the Musteloidea, including the striped skunk ("Mephitis mephitis"), long-tailed weasel ("Mustela frenata") and common raccoon ("Procyon lotor"); the red fox ("Vulpes vulpes"); and domestic or feral cats, are similarly opportunistic predators. All these pose little threat to the nimble, non-nesting adults, which are taken by certain smallish and agile birds such as the American kestrel ("Falco sparverius") and Cooper's hawk ("Accipiter cooperii"), and the sharp-shinned hawk ("A. striatus"). Other avian predators of adults have included peregrine falcons ("Falco peregrinus") and merlins ("Falco columbarius"). Owls such as great horned owls ("Bubo virginianus") and eastern screech owls ("Megascops asio") have been known to assault yellow warblers of all ages during night.