Rufous-capped Warbler
Encyclopedia
The Rufous-capped Warbler (Basileuterus rufifrons) is a New World warbler
New World warbler
The New World warblers or wood-warblers are a group of small, often colorful, passerine birds restricted to the New World. They are not related to the Old World warblers or the Australian warblers....

 native from Mexico
Mexico
The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

 south to much of Central America
Central America
Central America is the central geographic region of the Americas. It is the southernmost, isthmian portion of the North American continent, which connects with South America on the southeast. When considered part of the unified continental model, it is considered a subcontinent...

, rarely occurring as far north as southeastern Arizona
Arizona
Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...

 and south Texas
Texas
Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...

.

Rufous-capped Warblers generally reach a length of about 12.7 cm (5 inches). They are plain-olive to olive-gray, with white underbellies, bright yellow chests and throats, and a distinctive facial pattern consisting of a rufous cap, a white eyebrow-line (or superciliary), a dark eye-line fading into a rufous cheek, and a white malar marking. The bill is rather stout for a warbler, the wings are round and stubby, and the tail is long, often raised at a high angle and flicked.

While Rufous-capped Warblers are generally birds of tropical shrubby highlands, North American sightings tend to be in oak woodland canyon bottoms, near running water, while the birds stay low in dense vegetation.

The courtship song of the Rufous-capped Warbler is a rapid, accelerating series of chipping notes (chit-chit-chit-chitchitchit) somewhat reminiscent of the Rufous-crowned Sparrow
Rufous-crowned Sparrow
The Rufous-crowned Sparrow, Aimophila ruficeps, is a smallish American sparrow. This passerine is primarily found across the Southwestern United States and much of the interior of Mexico, south to the transverse mountain range, and to the Pacific coast to the southwest of the transverse range. Its...

, while the call notes is a hard chik or tsik, often repeated. Like other New World warblers, this species does not actually warble.

Rufous-capped Warblers primarily feed on insects and spiders, foraging through dense brush and scanning close to the ground for movement. They are not generally known to flycatch from perches.

Birds in the southern part of the range are sometimes split as Chestnut-capped Warbler (Basileuterus delattrii).

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