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
Frederick Wollaston Hutton in 1891. He was founding President of the Royal Society of New Zealand from 1904 to his death in 1905; he was followed by Sir James Hector. He worked successively at the Colonial Museum, Wellington (1871–1873); Otago Museum, Dunedin (1877–1879); and the Canterbury Museum, Christchurch (1887–1905) Hutton died on the return voyage from England on 27 October 1905, and was buried at sea off Cape Town, South Africa. He is commemorated in the Hutton Memorial Medal and Research Fund, awarded for scientific works bearing on the zoology, botany or geology of New Zealand. Hutton's shearwater ("Puffinus huttoni"), a sea bird,