White-vented storm petrel

The Elliot's storm petrel (Oceanites gracilis) is a species of seabird in the storm petrel family Hydrobatidae. The species is also known as the white-vented storm petrel. There are two subspecies, O. g. gracilis, which is found in the Humboldt Current off Peru and Chile, and O. g. galapagoensis, which is found in the waters around the Galapagos Islands. It is a sooty-black storm petrel with a white rump and a white band crossing the lower belly and extending up the midline of the belly. It has long legs which extend beyond the body in flight. In spite of the frequent sightings of this species it is very poorly known; only one nest has ever been found. The feeding behaviour of the Galapagos subspecies is unusual amongst storm-petrels as it forages close to shore; all other storm-petrels are exclusively pelagic.