On April 21st around 8:15 a.m. I was standing on the north side of Bay D when I heard a Raven croak several times quite loudly, and then the bird flew up, mobbed by Red-winged Blackbirds. The Raven flew north with something in its mouth, perhaps a nestling, but before too long, it dropped whatever it was and flew over to the top of a nearby pole, where it came to rest. I continued walking south and didn't see the bird again.