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 petrels today are global climate change and introduced species. An increased severity of storms makes it more dangerous to forage, decreasing the chances that an adult will return to the colony. The introduction of mammals also adversely affect storm petrels, where raccoons and river otters predate upon nests, and rabbits increase soil erosion and compromise the structural integrity of burrows. 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