Sabine's gull steals eggs from nesting colonies of Arctic terns. The Sabine's gull is a small gull, in length and weighing . The wings are long, thin and pointed with a span of between . The bill, which is black with a yellow tip, is around long. This species is easy to identify through its striking wing pattern. The adult has a pale grey back and wing coverts, black primary flight feathers and white secondaries. The white tail is forked. The male's hood darkens during breeding season. Young birds have a similar tricoloured wing pattern, but the grey is replaced by brown,
Fork-tailed storm petrel is along the coast of the northern Pacific Ocean, extending from northern California to northeast Asia. They mainly feed on planktonic crustaceans, small fish and squid, but will also consume offal. Similarly to other storm-petrels, it forages by picking food of the surface of the water while in flight. The fork-tailed storm petrel is small seabird that is 20 cm in length with a wingspan of 45.9 cm. Its foraging behaviour resembles other storm-petrels, where it flies with short stiff wingbeats close to the surface of the water. Despite its name, the forked tail in this bird is not always