Spotted hyenas are highly social animals, forming large groups called clans, which range from 6 to over 100 members. Hyenas in clans, like eighth graders in middle school, are sorted into complex social hierarchies. At the top of the pecking order are female hyenas. Though female hyenas are not significantly larger than males, their slightly larger size and increased aggression has previously been theorized to explain why they dominate the social order.
Also, female spotted hyenas have a pseudopenis.