Least Storm-Petrel

Oceanodroma microsoma

Order

PROCELLARIIFORMES

Family

Storm-Petrels (Hydrobatidae)

Code 4

LSTP

Code 6

OCEMIC

ITIS

Egg Color:

White



Number of Eggs:

1



Incubation Days:

50



Egg Incubator:

Both sexes



Nest Location:

In rock crevices or bare ground.



Nest Material:

No material added to nest.



Migration:

Migratory



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General

Least Storm-Petrel: Small, rare storm-petrel with dark black-brown body and short, wedge-shaped tail. Wings have black wing tips and pale brown diagonal bars visible in flight. Sexes are similar.

Range and Habitat

Least Storm-Petrel: This species breeds on rocky islands off both coasts of Baja California and occurs as a resident along the Pacific Coast of Mexico and further south. In summer and fall, these birds range as far north as San Diego County, California. They are pelagic, coming ashore only to breed.

Breeding and Nesting

Least Storm-Petrel: One white egg is laid on a bare rock or in a crevice. Incubation is carried out by both parents.

Foraging and Feeding

Least Storm-Petrel: Feeds on small marine organisms, including macroscopic zooplankton snatched from surface.

Vocalization

Least Storm-Petrel: Silent at sea. Makes twittering and squeaking notes while incubating eggs.

Similar Species

Least Storm-Petrel: Ashy Storm-Petrel is larger with paler underwings and forked tail. Black Storm-Petrel is much larger with forked tail. Other storm-petrels have pale rumps.

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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.
Parts of a Standing bird X
Head Feathers and Markings X
Parts of a Flying bird X