Occurrence of rabbits and hares in different climatic conditions is reflected in molting physiology. One to three molts are undergone in a years time according to specie. In some cases there is a sharp contrast in coloration between summer and winter coat color depending on specie and habitat. Suckling in both families occurs for only brief periods each day, five minutes. Weaning takes place at about three weeks of age.
Sexual maturity comes at three months in many rabbit species to a year or two in many hare species.
With human cultivation, hare and rabbit populations have spread and flourished. The once forested habitat, cut and planted or grazed, provides a favorable conditions for hares and rabbits. With few predators and much food, populations increase. Pikas are small Lagomorphs with rounded ears and a small, barely visible tail. Little is known about pikas because they live high in mountains or below ground in deserts.