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Leporidae (cohort Glires, order Lagomorpha) The family that includes the rabbits, cottontails, and hares. These are lagomorphs in which the tail is reduced, the hind legs are modified for jumping, and the ears are usually long. Rabbits are adapted for burrowing, and their young are born in burrows, naked and blind. Hares are born above ground, their eyes open, and fully furred. Cottontails do not burrow, but may use burrows dug by other animals. There are eight genera. They are distributed widely throughout the Holarctic region, where they are highly successful (there are more than 30 species), but are less common in Africa (about eight species) and S. America (two species).