Lions are the only cats that live in groups, which are called prides. Prides are family units that may include up to three males, a dozen or so females, and their young. All of a pride’s lionesses are related, and female cubs typically stay with the group as they age. Young males eventually leave and establish their own prides by taking over a group headed by another male. Female lions are the pride’s primary hunters. They often work together to prey upon antelope, zebra, wildebeest, and other large animals of the open grasslands.