Some birds, like a duck for example are know to participate in the forceful aggression of copulation, rape.
https://blogs.unimelb.edu.au/sciencecommunication/2014/10/13/the-twisted-sex-lives-of-ducks/>In many bird species, females tend to choose a mate after the male puts on an elaborate courtship display, and breeding pairs are often monogamous.>Ducks, however, are an exception. Ducks do pair off to mate, however stray males often force themselves onto females. This is especially true in Mallards. >“Rape is a normal reproductive strategy in mallards,” says Dutch researcher Kees Moeliker. 
