Ivory gull narrower os pubis, and potentially more flexibility in skull kinetic structure. Structurally, it is most similar to the kittiwakes; however, recent genetic analysis based on mtDNA sequences shows that Sabine's gull is the ivory gull's closest relative, followed by the kittiwakes, with Ross's gull and swallow-tailed gull sharing a clade with these species. "Pagophila" is maintained as a unique genus because of the bird’s morphological, behavioral and ecological differences from these species. Colloquial names from Newfoundland include slob gull (from "slob", a local name for drift ice) and ice partridge, from a vague resemblance to a ptarmigan. This species is
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