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Black-capped Vireo
Contour (Body feather)

Black-capped Vireo

Kingdom: Animalia; Phylum: Chordata; Class: Aves; Order: Passeriformes; Family: Vireonidae; Genus: Vireo; Species: Vireo atricapilla

Family: Vireonidae (Vireos)

Shape
Symmetrical, rounded tip with a broad, soft outline typical of body plumage.
Size
Extremely small, approximately 1.5 to 2.5 centimeters (0.6 to 1.0 inch) in length, consistent with a small passerine body feather.
Rarity
Rare to Uncommon; formerly listed as Endangered, now delisted but remains a high-priority conservation species with a specific, limited range.
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Description

This is a tiny body feather from a small, energetic songbird. The Black-capped Vireo is distinguished by its jet-black hood (in males) or slate-gray hood (in females), contrasting white 'spectacles' around the eyes, and olive-green back with yellowish flanks. They are roughly 4.5 inches long with a 7-inch wingspan.

Colour & Pattern

Base is a neutral grayish-brown transitioning to a pale yellow or olive-green wash at the distal tip; the color is melanin-based with some carotenoid influence for the yellow.

Barb Structure

Mixed structure; pennaceous at the distal tip for color display and plumulaceous at the proximal base for insulation; barbs appear loose and soft.

Texture & Surface

Silky and soft; the pennaceous portion is matte, while the plumulaceous portion is fluffy and lofted for heat retention.

Key Features

Diminutive size, olive-yellow tint at the tip, and a long, fluffy downy base (afterfeather area) characteristic of small temperate-migratory songbirds.

Habitat

Found in rangelands with scattered, low-growing deciduous shrubs and trees, specifically oak-juniper scrub and brushy ravines.

Geographic Range

Breeds in central and northern Texas, southern Oklahoma, and northern Mexico (Coahuila); migrates to the Pacific slope of western Mexico for winter.

Ecological Role

Insectivorous predator that helps control beetle and caterpillar populations; serves as an indicator species for the health of scrub-oak ecosystems.

Similar Species

White-eyed Vireo (Vireo griseus) and Bell's Vireo (Vireo bellii) have similar body feathers, but the specific olive-yellow saturation often helps distinguish the Black-capped.

Interesting Facts

The Black-capped Vireo was one of the first species to benefit significantly from targeted Brown-headed Cowbird management, as they are frequent victims of brood parasitism.

Condition Notes

Fair to Good; shows some signs of handling and slight matting of the downy barbs from being taped or mounted on cardstock.