The American Robin (Turdus migratorius) is a migratory songbird of the thrush family. The similarity between the orange-red coloring of its breast to that of the smaller and unrelated European Robin (Erithacus rubecula) led to its common name. The American Robin is the state bird of Connecticut, Michigan, and Wisconsin.

The American Robin is 23–28 cm (10–11 in) long, averaging about 77 g (2.7 oz), with a wingspan ranging from 119 to 137 millimeters. In the wild, the longest known lifespan of an American Robin is 14 years, but the average lifespan is about 2 years. It has a brown back with a reddish-orange breast. It is white underneath the tail feathers and on the lower belly. The throat is white with black streaks, and males are generally brighter than females. It has a small yellow beak and distinctive crescents around the eyes. There are seven sub-species, but only T. m. confinus in the southwest is particularly distinctive, with pale gray-brown underparts. Juveniles are paler in color than adult males and have dark spots on their breasts.

During the breeding season, the adult males grow distinctive black feathers on their heads; after the breeding season they lose this eye-catching plumage.

American Robins are active mostly during the day, assembling in large flocks at night, roosting in trees in secluded swamps or dense vegetation. In the winter, they gather in large numbers on their winter grounds, breaking up during the day to feed on fruits and berries in smaller flocks. During the summer, American Robins defend breeding territories and are less social during that time. Robins are frequently seen running across lawns, picking up earthworms by sight. In fact, the running and stopping behavior is a distinguishing characteristic. When stopping, they are actually looking for prey, not listening.

American Robin diet generally consists of around 40 percent invertebrates, such as beetle grubs, caterpillars, and grasshoppers, and 60 percent fruits and berries. It feeds on a mixture of both wild and cultivated fruits and berries. It forages primarily on the ground for soft-bodied invertebrates, and finds worms by sight, pouncing on them and then pulling them up.

Juvenile robins and eggs are preyed upon by squirrels, snakes, and some birds, such as Blue Jays, Common Grackles, American Crows, and Common Ravens. Adults are primarily taken by hawks, cats, and larger snakes, although when feeding in flocks, the American Robin is able to remain vigilant and watch other flock members for reactions to predators.

The male American Robin, as with many thrushes, has a beautiful, complex and almost continuous song. Its song is commonly described as a cheerily carol, made up of discrete units, often repeated, and spliced together into a string with brief pauses in between. The song varies regionally, and its style varies by time of day. American Robins will often be among the first songbirds singing as dawn rises, and last as evening sets in.