Stejneger's Petrel

Pterodroma longirostris

Order

PROCELLARIIFORMES

Family

Petrels and Shearwaters (Procellariidae)

Code 4

STPE

Code 6

PTELON

ITIS

Breeding Location:

Islands, grassy

Breeding Type:

Monogamous, Colonial

Breeding Population:

Accidental to casual

Egg Color:

White

Number of Eggs:

Incubation Days:

Egg Incubator:

Both sexes

Nest Material:

No material added to nest.

Migration:

Migratory

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General

Stejneger's Petrel: Small petrel with gray-brown upperparts, dark gray rump, and white underparts. Head and nape are black. Face is white and bill is black. Upperwing is deep gray-brown with black greater coverts and outer primaries forming an M pattern linked across lower back. Legs and feet are blue-gray. Tail is dark gray-brown mottled with white. Sexes are similar. Juvenile has grayer upperparts.

Range and Habitat

Stejneger's Petrel: Endemic breeder at Alejandro Selkirk island in the Juan Fernandez archipelago. Found in the Pacific from Juan Fernandez archipelago to southern California and east of Japan. Pelagic, only comes ashore to breed.

Breeding and Nesting

Stejneger's Petrel: One white egg is laid in a burrow or rock crevice. Incubation ranges from 51 to 54 days and is carried out by both parents.

Foraging and Feeding

Stejneger's Petrel: Eats squid and small fish; usually forages in flight by skimming, but sometimes plunge dives. Does not follow ships.

Vocalization

Stejneger's Petrel: Silent at sea.

Similar Species

Stejneger's Petrel: Cook's Petrel has paler crown and nape, and no contrast between crown and neck.

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Bird Call Credits: The Macaulay Library of Natural Sounds at the Cornell Lab of Ornithology. Martyn Stewart, http://www.naturesound.org, Redmond, Washington USA. The reuse or copying of bird calls in this database is strictly forbidden2.

Underparts

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

Upperparts

Back, rump, hindneck, wings, and crown.

Face

The front part of the head consisting of the bill, eyes, cheeks and chin.

Nape

Also called the hindneck or collar, it is the back of the neck where the head joins the body.

Outer primaries

The outer primaries are the primary feathers on the wing farthest from the body. They often appear to be the longest feathers on the wing.

Primaries

The primaries are the flight feathers specialized for flight. They are attached to the "hand" equivalent part of the wing.

Rump

The area between the uppertail coverts and the back of the bird.

Pelagic

The pelagic is a type of bird whose habitat is on the open ocean rather than in a coastal region or on inland bodies of water (lakes, rivers). An example of a pelagic bird is the blacklegged kittiwake.

Parts of a Standing bird

Head Feathers and Markings

Parts of a Flying bird

Field Guide to Birds of North America