Every evening at dusk, huge numbers of crows begin to swoop and soar as they move south though Bolton Hill airspace. From our porch (perch) on Bolton Street, they appear to be moving south between Eutaw Place and Mason Street, making brief stops on the tall trees and roofs before making their final way to communal roosting spots south of Bolton Hill. At dawn, the crows leave their roosts in mass and return north to feed, waking up sleeping humans with their caws.