SPECIES

Markham's Storm-Petrel Oceanodroma markhami

Fernando Medrano, Jacob Drucker, and Alvaro Jaramillo
Version: 2.0 — Published October 29, 2020

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Composite image in flight.

Small storm-petrel with long, pointed wings and a deeply forked tail. The body is entirely dark sooty brown, except for pale grayish brown upperwing coverts that form a distinct pale bar across the surface of the wings.

Side view.

Birds are sooty black above, shading to blackish brown on the underparts; the head, neck and mantle have a plumbeous gloss in fresh plumage.

Dorsal view.

The greater wing coverts and scapulars are paler, more gray brown, forming a distinct diagonal bar across the extended wing, which extends almost to the carpal joint, where it is broadest; this bar becomes paler with wear. Flight feathers are almost black, though the bases of the primary shafts may be white.

Ventral view.

The underparts are blackish brown. The tail is deeply forked.

Dorsal view.

The upperparts often appear tricolored, with a sooty brown back and lesser coverts, pale wing bands, and blackish flight feathers.The distal uppertail coverts may be paler than the back, creating slight contrast with the blackish tail.

Example breeding habitat.
Entrance to burrow.
Bird at entrance to nesting cavity.

Birds lay their egg inside naturally-formed saltpeter cavities.

Entrance to nesting cavity.
Juvenile affected by lights of Tenardita Mine.

Recommended Citation

Medrano, F., J. Drucker, and A. Jaramillo (2020). Markham's Storm-Petrel (Oceanodroma markhami), version 2.0. In Birds of the World (T. S. Schulenberg, S. M. Billerman, and B. K. Keeney, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.maspet.02