A new study shows female bonobos team up to fend off males in the wild. Scientists have long wondered why bonobos live in generally female-dominated societies since the males are physically bigger and stronger. Decades of observations in Congo show female bonobos work together to kick male bonobos out of trees and establish their dominance. Females that banded together more ranked higher in their community’s social ladder. It’s one of the rare times such a strategy has allowed females to come out on top in the animal kingdom. The research was published Thursday in the journal Communications Biology.