American Robin Sounds, All About Birds, Cornell Lab of Ornithology
Songs
The musical song of the American Robin is a familiar sound of spring. It’s a string of 10 or so clear whistles assembled from a few often-repeated syllables, and often described as cheerily, cheer up, cheer up, cheerily, cheer up. The syllables rise and fall in pitch but are delivered at a steady rhythm, with a pause before the bird begins singing again. At dawn, the song is more rapid.
Calls
American Robins often make a mumbled cuck or tuk to communicate with each other or a sharp yeep or peek as an alarm call. They also make a repeated chirr that rises in volume and can sound like a laugh or chuckle.
Other Sounds
Female robins aggressively clack their bill if approached while on the nest.