Brood size and survival to breeding in midwestern Peregrine Falcons

Because brood size might affect nutrition or behavioral development of young Peregrine Falcons (Falco peregrinus), we explored the relationship of the size of the brood from which individuals fledged to their probability of surviving to become breeders in the midwestern United States. In our sample, the probability of an individual peregrine surviving to become a breeder was not related to size of the brood from which it fledged, based on 139 broods fledging 379 young of which at least 38 survived to become breeders.