They nest in large colonies (rookeries) in tall trees, sometimes within towns;the nest, solidly constructed of twigs and soil, is used year after year.

• 在高树上（有时在城镇内）筑成大群鸟巢（秃鼻乌鸦群），其巢筑以小枝和泥土，构造坚固，可年年使用。