White-chinned petrel

Description

The white-chinned petrel measures 51–58 cm (20–23 in) in length,weighs 0.97–1.89 kg (2.1–4.2 lb) and spans 134–147 cm (53–58 in) across the wings.Not only is it the largest Procellaria petrel but is also the largest species in its family outside of the giant petrels.This large petrel is sooty-black and has some white on its throat and chin,more so in the Indian Ocean sector than the Atlantic.Its primaries can have a silvery appearance underneath.Its bill may be horn or yellow with a black tip,and also black between the nostrils.It has black feet.When it flies,it mixes slow wing beats with glides.Although normally quiet,it will rattle or groan while at its colony.