Night after night, the dense gathering of crows has been roosting this winter in the tall trees at the Old York Road medical center and in the Logan neighborhood nearby. Has moved into urban areas as woods and farmlands have declined. Varied, including insects, other birds' eggs, small land and aquatic animals, grains, fruit. Nest, high in tree or utility pole, is where breeding female lays three to seven eggs in springtime. Tall trees in cities or suburbs in winter months.
Birds gather there at night to sleep.
Survivors can live 14 years or so. And I don't know anywhere in Philadelphia where anybody has seen hundreds of birds come in every single night. What's happening in North Philadelphia is happening in cities and suburbs across America - part of a widespread change in crow culture, experts say. The once-rural birds are flocking by hundreds of thousands into urban and suburban areas because development is tearing away their sheltering woodlands and farms. They're mobbing the trees around the train station in downtown Trenton, roosting comfortably in Camden County and flying high over Chestnut Hill as they stream toward some nightly hangout.