Leach’s petrel

Leach's petrel (Oceanodroma leucorhoa) is a species of seabird distinguished from the storm petrel by its larger size, forked tail, longer wings, and distinctive bounding flight. It belongs to the family Hydrobatidae, which includes storm petrels. These birds are typically dark gray or brown, sometimes lighter underneath, and often have a white rump.12

Storm petrels, including Leach's petrel, are colonial breeders, nesting in burrows or rock crevices. They are found on islands in the North Atlantic and Pacific oceans. Both parents incubate a single egg, and chicks are deserted by parents before they are fully fledged, completing their development on stored fat. During the nonbreeding season, they forage at sea for small marine organisms.2