Great black-backed gull stomach contents of great black-backed gulls was made up of birds, while a further 17% of stomach contents was made up of tern eggs alone. Adult or fledged juveniles of various bird species have also been predaceously attacked. Some fully-fledged or adult birds observed to be hunted in flight or on the ground by great black-backed gulls have included "Anas" ducks, ruddy ducks ("Oxyura jamaicensis"), buffleheads ("Bucephala albeola"), Manx shearwaters ("Puffinus puffinus"), pied-billed grebes ("Podilymbus podiceps"), common moorhens ("Gallinula chloropus"), terns, Atlantic puffins ("Fratercula arctica"), coots ("Fulica" ssp.), glossy ibises ("Plegadis falcinellus"), rock pigeons ("Columba livia") and even predatory birds
Storrs L. Olson world's foremost paleornithologists. He was also the 1994 recipient of the Loye and Alden Miller Research Award. He was formerly curator of birds at the United States National Museum of Natural History; , he holds an emeritus position in the institution. Several prehistoric bird species have been named after Olson, including "Nycticorax olsoni", "Himantopus olsoni", "Puffinus olsoni", "Primobucco olsoni", "Gallirallus storrsolsoni", and "Quercypodargus olsoni". Storrs L. Olson Storrs Lovejoy Olson (born April 3, 1944) is an American biologist and ornithologist who spent his career the Smithsonian Institution, retiring in 2008. One of the world's foremost avian paleontologists, he is best