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 Fork-tailed storm petrel The fork-tailed storm petrel ("Oceanodroma furcata" or "Hydrobates furcatus") is a small seabird of the storm petrel family Hydrobatidae. It is the second most abundant and widespread storm petrel (after the Leach's storm petrel) and is the only bird in its family that is bluish-grey in colour. The fork-tailed storm petrel is pelagic, spending up to 8 months in the northern Pacific ocean. They only return to land to breed, where they nest in a colony. Their nest can be found in a rock crevice or small burrow where a single egg is laid. Their breeding range