White-faced storm petrel
The white-faced storm petrel small seabird of the austral storm petrel. The white-faced storm petrel is 19 to 21 cm in length with a 41 to 44 cm wingspan. It has a pale brown to grey back, rump and wings with black flight feathers. It is white below, unlike other north Atlantic petrels, and has a white face with a black eye mask like a phalarope. Its plumage makes it one of the easier petrels to identify at sea.
It nests in colonies close to the sea in rock crevices and lays a single white egg. It spends the rest of the year at sea. It is strictly nocturnal at the breeding sites to avoid predation bygulls and skuas, and will even avoid coming to land on clear moonlit nights.