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Stejneger's Petrel

Pterodroma longirostrisOrder: PROCELLARIIFORMES Family: Petrels and Shearwaters (Procellariidae)
Codes: Common Name: STPE Scientific Name: PTELON ITIS Taxonomic No.: 174582
Vulnerable
 
Stejneger's Petrel
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Overview

Stejneger's Petrel: Small petrel with gray-brown upperparts, dark gray rump, white underparts. Black head, nape, bill. White face. Gray-brown upperwing, black greater coverts and outer primaries forming an M pattern across lower back. Legs and feet are blue-gray. Gray-brown tail mottled with white.

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.

Topo Map: Gull-like Body


Voice Text

Generally silent

Interesting Facts

 The population of the Stejneger's Petrel is decreasing due to introduced cats on its breeding islands.

 It is considered a vulnerable species because of its restricted breeding range.

 A group of petrels are collectively known as a "gallon" and a "tank" of petrels.


Bird Term Glossary



Author

Gary Owen Dick

Artist

Irina Rud-Volga

Splitbar
Range Map for Stejneger's Petrel

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Family Petrel (Procellariidae)_blue
Species Pterodroma longirostris
Length12 Inches
Wingspan30 Inches

Stejneger's Petrel

Stejneger's Petrel: Small petrel with gray-brown upperparts, dark gray rump, white underparts. Black head, nape, bill. White face. Gray-brown upperwing, black greater coverts and outer primaries forming an M pattern across lower back. Legs and feet are blue-gray. Gray-brown tail mottled with white.

● Song: Generally silent

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

● Breeding & 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.

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

Flight Pattern

Rapid, erratic, and batlike flight with fast jerky wing beats followed by banking and arcing glides.
Stejneger's Petrel Body Illustration
● Range & 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.
BreedingMonogamous, Colonial
PopulationAccidental to casual
MigrationMigratory
Weight12.2 Ounces
Gull-like BodyX
UnderpartsX
Belly, undertail coverts, chest, flanks, and foreneck.
UpperpartsX
Back, rump, hindneck, wings, and crown.
FaceX
The front part of the head consisting of the bill, eyes, cheeks and chin.
NapeX
Also called the hindneck or collar, it is the back of the neck where the head joins the body.
Outer primariesX
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.
PrimariesX
The primaries are the flight feathers specialized for flight. They are attached to the "hand" equivalent part of the wing.
RumpX
The area between the uppertail coverts and the back of the bird.
PelagicX
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.
4 and 6 letter alpha codesX

The four letter common name alpha code is is derived from the first two letters of the common first name and the first two letters of common last name. The six letter species name alpha code is derived from the first three letters of the scientific name (genus) and the first three letters of the scientific name (species). See (1) below for the rules used to create the codes..

Four-letter (for English common names) and six-letter (for scientific names) species alpha codes were developed by Pyle and DeSante (2003, North American Bird-Bander 28:64-79) to reflect A.O.U. taxonomy and nomenclature (A.O.U. 1998) as modified by Supplements 42 (Auk 117:847-858, 2000) and 43 (Auk 119:897-906, 2002). The list has been updated by Pyle and DeSante to reflect changes reported by the A.O.U from 2003 through 2006.

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ITIS CodesX

The Integrated Taxonomic Information System (ITIS) was established in the mid-1990�s as a cooperative project among several federal agencies to improve and expand upon taxonomic data (known as the NODC Taxonomic Code) maintained by the National Oceanographic Data Center (NODC), National Oceanic and Atmospheric Administration (NOAA).

To find the ITIS page for a bird species go to the ITIS web site advanced search and report page at http://www.itis.gov/advanced_search.html. You can enter the TSN or the common name of the bird. It will return the ITIS page for that bird. Another way to obtain the ITIS page is to use the Google search engine. Enter the string ITIS followed by the taxonomic ID, for example "ITIS 178041" will return the page for the Allen's Hummingbird.

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Parts of a Standing birdX
Head Feathers and MarkingsX
Parts of a Flying birdX