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Dark-eyed Junco (Slate-colored form)
Tail feather (rectrix), specifically one of the outer white-edged rectrices

Dark-eyed Junco (Slate-colored form)

Kingdom: Animalia, Phylum: Chordata, Class: Aves, Order: Passeriformes, Family: Passerellidae, Genus: Junco, Species: J. hyemalis

Family: Passerellidae (New World Sparrows)

Shape
Symmetrical vane with a slightly rounded to squared tip, typical of passerine tail feathers.
Size
Approximately 2 to 2.5 inches long, consistent with the outer tail feathers of a small songbird like the Dark-eyed Junco.
Rarity
Very Common
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Description

The Dark-eyed Junco is a small, neat sparrow often affectionately called a 'snowbird' due to its arrival in winter. This specific feather is an outer tail rectrix, famous for its diagnostic white flash that is conspicuously flicked open as the bird hops along the ground.

Colour & Pattern

Bicolor pattern featuring a dark slate-gray basal and inner web contrasting sharply with a bright white outer web and tip, serving as a classic flash field mark.

Barb Structure

Pennaceous structure with tightly interlocked barbs and barbules along the upper portion, transitioning to slightly looser barbs near the base.

Texture & Surface

Soft yet structurally firm for flight control, smooth matte texture typical of small perching bird tail feathers.

Key Features

Striking and abrupt contrast between dark slate-gray and pure white on a relatively small, delicate tail feather.

Habitat

Coniferous and mixed forests, forest edges, brushy areas, and suburban yards during migration and winter.

Geographic Range

Breeds across northern North America and mountainous regions; winters throughout most of the United States and Mexico.

Ecological Role

Consumes vast quantities of weed seeds and insects during the breeding season, serving as an important seed predator and foraging component of forest floor ecosystems.

Similar Species

Other sparrow and towhee species with white tail markings, though the exact extent and clean division of the slate-gray and white in the Junco are distinctive.

Interesting Facts

Juncos are frequent visitors to backyard bird feeders and are part of a complex species group that hybridizes in overlap zones across North America.

Condition Notes

Good condition with intact barbs and minimal wear, showing clear structural integrity.