
American Redstart
Kingdom: Animalia, Phylum: Chordata, Class: Aves, Order: Passeriformes, Family: Parulidae, Genus: Setophaga, Species: Setophaga ruticilla
AI-generated identification · may be incorrectFamily: Parulidae (New World Warblers)
- Shape
- Asymmetrical vane with a slightly tapered, rounded tip; narrow leading vane compared to the trailing vane
- Size
- Estimated 2.0-2.5 inches (5-6 cm) in length, consistent with the tail proportions of a small wood-warbler
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Description
A small, active warbler known for its 'butterfly-like' flight. Adult males are black with bright orange patches, while females and immatures are olive-gray with yellow or pale patches as seen here
Colour & Pattern
Distinctive 'flash pattern' consisting of a deep charcoal-black distal half and a bright basal patch. The white/pale basal color indicates a female or immature male (adult males have orange patches)
Barb Structure
Pennaceous structure throughout most of the vane for flight stability, becoming plumulaceous (downy) at the umbilical base
Rachis & Barb Pattern
Dark melanin-pigmented rachis through the black section, transitioning to a pale or translucent shaft within the basal light patch; barbs are densely packed
Texture & Surface
Smooth and slightly glossy on the upper surface; the vane is flexible yet firm enough to provide lift and steering during erratic flight
Feather Placement
Outer tail (rectrix); the high degree of asymmetry and the specific color distribution indicate a position toward the edge of the tail fan
Key Features
Bold bicolor pattern (black tip, pale base), asymmetrical rectrix shape, and its small passerine size
Habitat
Found in open deciduous and mixed woodlands, second-growth forests, and riparian thickets across North America
Geographic Range
Breeds across much of North America including Canada and the eastern/northern US; migrates to Central America, the Caribbean, and northern South America
Ecological Role
Insectivorous predator that helps control forest insect populations; serves as a vital link in the migratory food web between continents
Similar Species
Magnolia Warbler (similar tail spots but typically more squared), Canada Warbler (different tail pattern), or juvenile Hooded Warbler
Interesting Facts
American Redstarts are known for 'flash-and-pivot' foraging, spread-tailing to startle insects into flight and then catching them mid-air
Cultural Significance
Historically documented by naturalists like Audubon; currently of high interest to citizen scientists and bird banders for migration tracking
Field Identification Tips
Look for these feathers under shrubby deciduous trees in late summer (molt season) or near migration 'trap' locations along the coast
Condition Notes
Good condition; the tip shows minor wear and the calamus is intact, suggesting a natural molt rather than predation