Crescent-chested Warbler
Oreothlypis superciliosa
Attractive, fairly common warbler of oak and pine-oak woods in highlands and foothills. Typically forages in leaf clusters and is usually seen at middle to upper levels in canopy, especially in oaks. Often associates with mixed-species feeding flocks of other warblers, vireos, titmice, and orioles, etc. Note the bold white eyebrow, lack of white wingbars, and the extensive yellow bib with a variable dark reddish crescent on the breast (can be almost absent on some immatures). Song is a cicada-like buzz.
识别特征
The crescent-chested warbler is superficially similar to both the northern parula and the tropical parula, with yellow underparts, a gray head, and a greenish back, but neither of these has a bold white eyebrow. Adult males have a discrete chestnut crescent on the breast, which is less prominent and sometimes lacking in females and young birds.
分类信息
- 学名
- Oreothlypis superciliosa
- 命名信息
- (Hartlaub, 1844)
- 目
- Passeriformes
- 科
- Parulidae
- 属
- Oreothlypis
分布与栖息地
- 迁徙
- Resident species
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
White-fronted Bee-eater
Merops bullockoides
A bright and colorful bee-eater; the red throat and white line under the black face mask render it unmistakable. Pairs and groups inhabit woodland adjacent to watercourses, hillsides, and scrub, especially near earthen banks, where nesting colonies are formed by up to 450 individuals burrowing into the dirt. They have one of the most complex of all avian societies, featuring families, clans, and pirates! A nasal rolling “ngyaaau” is the main vocalization.
San Blas Jay
Cyanocorax sanblasianus
Handsome blue-and-black jay of tropical forests, woodlands, and gardens endemic to west Mexico. Usually in small groups, which can be noisy and conspicuous or very quiet and easily overlooked; often with Yellow-winged Caciques. Around the town of San Blas (in Nayarit, Mexico), appreciably larger Purplish-backed Jay occurs at southern end of its range (and northern end of San Blas Jay’s range). Purplish-backed is deep purplish blue on back and tail, not strikingly two-toned blue-and-black like San Blas Jay, and has bright yellow legs. Voices also very different. Purplish-backed occurs in mangroves and adjacent woodlands in and around town while San Blas Jay occurs in foothill forest of coffee plantations south of town.
Unicolored Jay
Aphelocoma unicolor
Well-named, this uniformly deep-blue jay occurs locally in highland evergreen and pine-evergreen forest. Like most jays, usually found in groups, often in association with mixed-species feeding flocks that include orioles, woodcreepers, and other jay species. Most likely confused with southern forms of Steller’s Jay, which occur in the same areas. Steller’s has bold white face spots, darker plumage with barring on wings, and short crest (which can be held flat). Also note rather different voices.
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