They saw the masculine display, the casual violence, and thought they were seeing just what the estrous female wanted.

A male will form a mating consortship with an estrous female, staying close to and copulating with her.

During courtship, a male consorts with an estrous female, following and sniffing her.

However, a male that attempts to mate with an estrous female may face aggression from other males.

Once an estrous female is detected, the male will attempt to court her.

Males compete with one another for the opportunity to mate with the estrous female.

In the presence of estrous females, the males bray loudly.

Adult males only join sounders that have estrous females.

Fights establish dominance relationships among males, and determine who gets access to estrous females.

Bulls will fight one another to get access to estrous females.