American Robins are gray-brown birds with warm orange underparts and dark heads. In flight, a white patch on the lower belly and under the tail can be conspicuous. Compared with males, females have paler heads that contrast less with the gray back. Behavior American Robins are industrious and authoritarian birds that bound across lawns or stand erect, beak tilted upward, to survey their environs. When alighting they habitually flick their tails downward several times.
Habitat In fall and winter they form large flocks and gather in trees to roost or eat berries. American Robins are common across the continent in gardens, parks, yards, golf courses, fields, pastures, tundra, as well as deciduous woodlands, pine forests, shrublands, and forests regenerating after fires or logging.
There was a flock of Robins harassing a Mockingbird who was defending off several Robin harasses for the better part of the morning.