
Dark-eyed Junco (Slate-colored form)
Kingdom: Animalia, Phylum: Chordata, Class: Aves, Order: Passeriformes, Family: Passerellidae, Genus: Junco, Species: J. hyemalis
AI-generated identification · may be incorrectFamily: Passerellidae (New World Sparrows)
- Shape
- Slightly asymmetrical vane with a pointed to rounded tip, typical of outer retrices showing white flash.
- Size
- Approximately 2 to 2.5 inches long, consistent with a small passerine tail feather.
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Description
The Dark-eyed Junco is a small, neat sparrow often nicknamed the 'snowbird' for its arrival with winter weather. Adults have a hood-like slate-gray head and breast, a white belly, and pinkish bills. Their most famous field mark is the flashing white outer tail feathers prominently displayed during flight.
Colour & Pattern
Distinctive two-tone pattern featuring a dark charcoal gray or slate tip on the outer web contrasting sharply with a bright white inner web and margin, typical of the classic slate-colored junco tail pattern.
Barb Structure
Pennaceous structure near the dark tip and outer web, transitioning to somewhat looser barbs along the white inner web. Barbs are intact but show minor fraying.
Rachis & Barb Pattern
Thin, white to pale gray central rachis that is moderately flexible, with barbs extending at an acute angle, transitioning cleanly from dark gray pigment to stark white.
Texture & Surface
Smooth, lightweight, and matte finish typical of a small perching bird's flight or tail feather.
Feather Placement
Tail (outer rectrix, likely R6), indicated by the prominent white margin/patch on the outer web.
Key Features
Sharp contrast between dark slate-gray and stark white on the outer tail feathers, characteristic of the slate-eyed form of Junco hyemalis.
Habitat
Coniferous and mixed forests, woodland edges, brushy areas, and suburban yards during migration and winter.
Geographic Range
Breeds across northern and montane North America; winters throughout most of the United States and northern Mexico.
Ecological Role
Acts as an important seed predator and ground-forager, helping control weed seeds while serving as a key prey base for small hawks and northern shrikes.
Similar Species
Other sparrow species with white tail markings, such as Vesper Sparrows or Towhees, though the extensive clean white paired with dark slate-gray is uniquely striking in Juncos.
Interesting Facts
Juncos are ground-foraging birds that often hop rather than walk. Studies show that urban juncos have evolved slightly different wing shapes and lower stress hormones compared to their mountain counterparts.
Cultural Significance
As a small backyard bird, they are beloved by winter birdwatchers. Historically and culturally, small feathers from songbirds are not typically used commercially due to legal protections.
Field Identification Tips
Look near brush piles, under bird feeders, or along forest edges during winter and spring migration where juncos frequently forage on the ground.
Condition Notes
Fair condition with slight fraying along the edges of the vane and minor wear at the tip, indicating it was naturally molted.