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Colima Pygmy Owl - Glaucidium palmarum

 
Calls - Glaucidium palmarum
Typical call, male Panuco, Sinaloa, Mexico. November 1999. CC Richard Hoyer

Introduction: The Colima Pygmy Owl is a very small pygmy owl with yellow eyes and no ear-tufts.

[For help with terms used in the description, see parts of an owl. For general characteristics common to most owl species, see owl physiology.]

Description: The facial disc is pale ochre with indistinct darker concentric lines. Eyebrows are short and whitish. Eyes are yellow. Cere and bill are yellowish-horn. Upperparts are greyish tawny-brown, with the mantle slightly more greyish than the crown. Forehead to nape are densely spotted whitish or pale buff. The nape has an occipital face (false eyes) with a cinnamon band across the hindneck. Scapulars have indistinct pale buffish spots, and the wing-coverts are slightly spotted pale buff. Flight feathers are barred light and dark, and the tail is greyish-brown with 6-7 buffish-white bars, of which only 3-4 are normally visible, as 2 are concealed by the uppertail-coverts.
Underparts are off-white. The sides of the upper breast and streaking on the rest of the underparts are cinnamon-brown.
Tarsi are feathered, and the pale yellowish toes are bristled. Claws are horn with darker tips.

Size: Length 13-15cm. Wing length males 81-85mm, females 84-88mm. Tail length males 51-54mm, females 53-56mm. Weight 43-48g. Females are heavier.

Habits: Not well studied. This owl is partly diurnal. Other habits likely similar to other Pygmy Owls.

Voice: The song of the male is a series of hollow, short notes, often increasing in number (up to 24 or more in one phrase), about three notes per second - whew-whew-whew whew-whew-whew-whew-whew whew-whew-whew-whew-whew-whew... The interphrase intervals are relatively long. The series are often preceded by trilling notes.

Hunting & Food: The Colima Pygmy Owl feeds on small birds, reptiles and other small vertebrates, as well as larger insects and other invertebrates.

Breeding: Little studied, likely nests in abandoned woodpecker holes and lays eggs in May.

Habitat: Dry, tropical woodland from sea level up to about 1500m, including thorny woods in foothills, palm groves, semi-deciduous forest up into dry oak woodland. Sometimes inhabits dry pine-oak woods. Occurs locally in ravines at the upper edge of tropical deciduous forest, and has also been recorded in swampy forest.

Distribution: West Mexico along the Pacific coast from Central Sonora to the Isthmus of Tehuantepec in Oaxaca.

Distribution of Colima Pygmy Owl - Glaucidium palmarum
Distribution of the Colima Pygmy Owl Glaucidium palmarum

Status: Uncertain, locally common.

Original Description: Nelson, Edward William. 1901. Auk 18: p 46.

Subspecies: G. p. griscomi, G. p. oberholseri

References:

del Hoyo, Elliott & Sargatal. 1999. "Handbook of the Birds of the World: Barn Owls to Hummingbirds". Buteo Books
Johnsgard, Paul A. 2002. "North American Owls: Biology and Natural History". Smithsonian
König, Claus & Weick, Friedhelm. 2008. "Owls: A Guide to the Owls of the World (Second Edition)". Yale University Press
König, Weick and Becking. 1999. "Owls: A Guide to the Owls of the World". Yale University Press
Voous, Karel H. 1988. "Owls of the Northern Hemisphere". The MIT Press

Page Information:

Page compiled by . Page last updated 2013-05-28

OwlPages.com Owl Species ID: 190.120.000

 
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