American robins may mob small predators, such as blue jays and snakes. They also produce chirping and chucking sounds as warning calls.
Predators on young and adults differ somewhat. Eggs and young are often eaten by different types of squirrels, snakes, and birds such as blue jays, common grackles, American crows, and common ravens. Adult American robins are preyed upon by hawks, cats, and larger snakes.
American robins are vigilant when feeding, they may feed in loose flocks, so that they can also watch other robins for reactions to predators.
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