Bulwer's Petrel

Bulweria bulwerii

Order

PROCELLARIIFORMES

Family

Petrels and Shearwaters (Procellariidae)

Code 4

BUPE

Code 6

BULBUL

ITIS

Breeding Location:

Islands, sandy or rocky

Breeding Type:

Monogamous, Colonial

Breeding Population:

Accidental in North America

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

Bulwer's Petrel: Medium-sized petrel, dark brown overall with pale diagonal bars across secondary coverts. Long tail is usually held in a point; wedge shape visible only when fanned. Bill and legs are dark. Sexes are similar.

Range and Habitat

Bulwer's Petrel: Breeds on small oceanic islands and offshore islets in the tropical Pacific and Atlantic oceans; accidental summer visitor off Monterey, California, and Outer Banks, North Carolina. Pelagic, comes ashore only to breed.

Breeding and Nesting

Bulwer's Petrel: One white egg is laid in a burrow or rock crevice. Incubation is carried out by both parents.

Foraging and Feeding

Bulwer's Petrel: Feeds on squid, plankton, and small fish; forages by picking food from surface while in flight.

Vocalization

Bulwer's Petrel: On breeding grounds makes a staccato monotonous "uh-uh-uh-uh" that sounds like a small motor running; usually silent at sea.

Similar Species

Bulwer's Petrel: Fiji Petrel lacks pale diagonal bars on wings.

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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.

Field Guide to Birds of North America