house crows have gathered to collect food

animal animals anthropogenic behaviour bird birds birdwatching black branch bright city clever cluster collect collection comfortable companions concept cornix corvus crow crowd crows dumb environment feather flock food gathered gatherer gathering gray greynecked ground hooded horde house huddle human impact indian intelligence migration nature ornithology overnight predator prey public roosting scavenger smart splendens state synanthropic the tree waste wildlife wings winter