Black-winged Petrel

Pterodroma nigripennis

Order

PROCELLARIIFORMES

Family

Petrels and Shearwaters (Procellariidae)

Code 4

BWPE

Code 6

PTENIG

ITIS

Egg Color:

White



Number of Eggs:

1



Incubation Days:

38



Egg Incubator:

Both sexes



Nest Location:

In burrow below tussock grass.



Nest Material:

None.



Migration:

Migratory



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General

Black-winged Petrel: Medium-sized petrel with fairly short and stout black bill; gray and white; dark gray around eye with darker marks below eye; anterior lores, cheek, side of head below ear coverts white. Upperwings black with gray secondaries, rest of upperparts gray. Underparts white with narrow gray band across upper breast, underwing white with boldly contrasting black edging; partial gray collar. Legs and base of feet are pink, darkening to black or gray; iris is black-brown. Sexes are similar. Juvenile is similar to adult.

Breeding and Nesting

Black-winged Petrel: These petrels nest on higher ground in burrows or rock crevices with the entrance hidden by scrub, tussocks or grassy mats. One white egg is laid in the burrow in areas of tussock grass on high ground of oceanic islands. Incubation lasts for a period of five to six weeks, and is carried out by both sexes. The chick is fed by both parents and fledged after about three months.

Foraging and Feeding

Black-winged Petrel: These petrels forage by swooping down to the water and picking small squid and crustaceans from just beneath the surface. Their diet is comprised of squid and prawns, which are caught mainly by surface-seizing and dipping, or sometimes pattering. It has often been observed feeding in association with other Procellariiformes.

Vocalization

Black-winged Petrel: Shrill and mewing calls, "o-hi", "o-hoe", "or-wik", "si-si-si."

Similar Species

Black-winged Petrel: Other similar species lack the combination of a dark eye patch, white belly, and extensive black on both the leading and trailing edges of the underwing.

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UnderpartsX

Belly, undertail coverts, chest, flanks, and foreneck.

UpperpartsX
Back, rump, hindneck, wings, and crown.
BreastX
The upper front part of a bird.
CollarX
Similar to the upper part of the human neck, located at the back of the crown.
SecondariesX
Flight feathers that are attached to the wing in the area similar to the human forearm and between the body and the primaries.
Parts of a Standing bird X
Head Feathers and Markings X
Parts of a Flying bird X