A classic rivalry is chickens vs hawks.
Brown-headed cowbirds, which are nest parasites, are enemies of many song birds (such as red-winged blackbirds, song sparrows, and yellow warblers).
Birding eating raptors, such as Peregrine Falcons and Cooper’s Hawks, are also pretty much universally disliked by song birds.
Do your own homework kid.
I have to write an allegory (like 'Animal Farm') about a famous event in history, and was thinking about the space race, so i wanted to do birds, but i need to do two groups, one soviet, and the other america. They need to be a part of the same ecosystem,
