Robins near the sea will also eat mollusks and tiny fish. In the spring, robins will usually migrate back to the same area year after year. Males stake out their territories before the females arrive, singing love songs to the females. From early fall until spring, the males do not sing. However, you can hear their other chatter and calls throughout the year.
Females call but leave the singing to the males.
Instead of singing, the females devote their attention to the building of their nests. Sometimes the males will attempt to help but follow the direction of the determined females. Grass, twigs, and found materials are mixed with mud to make a round nest in the trees or in a handy nook around the garden. Then the female robin will settle down to business and lay 3 - 4 eggs that are usually light blue. Once the fledglings leave the nest, the male will continue to feed and train the young birds while the female begins another clutch.