Males will establish a territory and nest site, and then attract a female. They are very gregarious, and will breed close to other pairs of starlings. During vicious fights over breeding sites, the birds will grab each other with their feet, and peck each other. ... Both birds of a pair will help build the nest.

Why are starlings so aggressive?

Starlings are so aggressive that they will out-compete native cavity-nesting species—such as bluebirds and Red-headed Woodpeckers—so your birdhouses are likely to home them instead of any birds you might want to attract. Starlings are considered one of the most destructive birds when it comes to native songbirds.

Do starlings fight each other?

They may be small and dainty, but when it comes to their food, they certainly put up a good fight. This fiercely fought battle between two young starlings has been documented by a bird lover in a series of stunning images.