Colima Warblers, Vermivora crissalis
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The Colima Warbler, Vermivora crissalis, is a New World warbler. The Colima Warbler is mainly found in the Sierra Madre Occidental of central Mexico, though its range just barely extends into adjacent south-western Texas in the Chisos Mountains of Big Bend National Park.
The Colima warbler is about 4½ to 5 inches in length. They are mainly dark gray and brownish in coloration, with a pale under-side. Their rump and the feathers below their tail are yellow. They have a white ring around their eye, and a tinge of pale color on their breasts. Males have a spot of orange on the top of their heads.
In appearance the Colima Warbler is very similar to the Virginia's Warbler, but is larger in size, more robust, and heavier billed. The Virginia's Warbler has much more yellow or pale color on their breasts, which is more gray in the Colima Warbler. The yellow above and below the tail is also more orange-yellow in the Colima's Warbler, and more greenish-yellow in Virginia's Warblers.
Life history
Nesting is done on the ground. Forming a loose cup-shaped nest of grass, leaves, and moss the Colima Warbler hides its nest among the mountain rocks. It usually lays four eggs, which are white to cream-colored and speckled with brown.
References
- BirdLife International (2004). Vermivora crissalis. 2006 IUCN Red List of Threatened Species. IUCN 2006. Retrieved on 11 May 2006. Database entry includes a brief justification of why this species is near threatened
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