Bluebird
Bluebirds are territorial and prefer open grassland with scattered trees. Predators of young bluebirds in the nests may include snakes, cats, and raccoons. Bird species competing with bluebirds for nesting locations include the common starling, American crow, and house sparrows. House sparrows take over the nesting sites of bluebirds, killing young, smashing eggs, and probably killing adult bluebirds.