Westland Petrel vs White-chinned Petrel

Westland Petrel

Procellaria westlandica

Large1.2 kgMarine

The adult Westland petrel is a stocky bird, weighing around 1,100 grams (39 oz). It is entirely dark blackish-brown, with black legs and feet. Some individuals may have a few white feathers. The bill is pale yellow with a dark tip. Falla measured the female and male birds for his original description and pointed out that the male of the species measured slightly larger than the female. However the female specimen weighed slightly more than the male. It is one of the largest of the burrowing petrels.

ID text from Wikipedia, CC BY-SA 4.0

Photo: Mark Jobling · Public domain

White-chinned Petrel

Procellaria aequinoctialis

Large1.2 kgMarine

The white-chinned petrel measures 51–58 cm (20–23 in) in length and has a wingspan of 134–147 cm (53–58 in). Males are heavier and average 1,390 g (49 oz) whereas females weigh around 1,280 g (45 oz). 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 some black between the nostrils.

ID text from Wikipedia, CC BY-SA 4.0

Photo: Mjobling · CC BY 3.0

Photos and recordings are credited to their authors under the licence shown. Full profiles: Westland Petrel and White-chinned Petrel.