Red-tailed Hawks often raid American Robin nests, but today I saw my first robin nestling be delivered to a nest. The eyasses had a hard time dividing it up a the three of them kept stealing it from each other. Young hawks need to be able to feed themselves before they leave the nest, so a nestling robin made a good first do it yourself meal.
I saw similar behavior last year, at the Peregrine Falcon nest at 86th and West End. There the parents stopped feeding the young falcons, and simply dropped off House Sparrows to each youngster a few days before they were ready to fledge.