Impala Harem
Tarangire National Park, Tanzania 2019
A group of females controlled by one breeding male is called a harem. A group of males who are not breeding is called a bachelor herd. If the Impala who controls the harem is knocked off his perch by another male, then the dethroned male goes out on his own, and does not join a bachelor herd, usually. This makes him more vulnerable to predators.