The best known of the cats, lions are also the most social, living in prides that range in size from 3-30 individuals. This variance is dependent on the availability of prey. Related females and their cubs form the core. Daughters usually become members of the pride, though some leave as soon as they reach maturity in their search for a mate. They may return to their natal pride later in life. While the female population of a pride remains stable, males are transient, staying as little as a couple of months or as long as six years, until they're driven off by other males. A pride may have anywhere from 1-7 males. Lions have a top speed of 40 mph over short distances. Both males and females have been known to climb trees.