The Lagomorphs are the members of the taxonomic order Lagomorpha, of which there are two living families: the Leporidae (hares and rabbits) and the Ochotonidae (pikas). The name of the order is derived from the Greek lagos (λαγός, "hare") and morphē (μορφή, "form"). There are about eighty species of lagomorph which include thirty species of pika, twenty species of rabbits and cottontails, and thirty species of hares.