"At dawn and dusk in the mountainous regions of the western United States, the Mountain Cottontail forages for sagebrush, western juniper, and grasses, almost always close to cover. As befits a rabbit that lives where it gets very cold, its feet are covered with long, dense hair, and its rather short ears are furry inside. Young rabbits are born blind and hairless, in nests lined with grass and the mother's fur, in litters of four to eight. (In contrast, hares are born fully furred and ready to hop.) A female Mountain Cottontail may produce five litters each year."
Links:Mammal Species of the WorldClick here for The American Society of Mammalogists species account
Original description: Bachman, J., 1837. Observations on the different species of hares (genus Lepus) inhabiting the United States and Canada, p. 345. Journal of the Academy of Natural Sciences of Philadelphia, 7:282-361.