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
Antipsara is a nesting site of the European shag ("Phalacrocorax aristotelis"), Eleonora's falcon ("Falco eleonorae"), Cory's shearwater ("Calonectris diomedea"), and the yelkouan shearwater ("Puffinus yelkouan"). Antipsara Antipsara () is a small Greek island in the Aegean Sea. Antipsara had 4 inhabitants according to the 2011 census. It lies about west of the larger island Psara, from which its name is derived. Geographic conditions make it inaccessible from the north and west side. Evidence exists of settlement in ancient Greek and Roman times. During the Ottoman rule the island served as a port. Nowadays, tourist trips to the island originate from Psara