Reproduction of American robin (Turdus migratorius) in a suburban environment

We compared the breeding biology of the American robin in a suburban population and in populations from less urbanized environments using data from 141 nests from a dense suburb near Montreal, Que., and data from the literature. Our data suggest that robins potentially can have a large clutch size and very high rates of reproductive success in suburban areas and that the breeding season seems to be longer in suburbs than in more rural settings. In our study area, robins rarely used artificial nesting substrate.