
American Kestrel (formerly Sparrow Hawk)
Kingdom: Animalia; Phylum: Chordata; Class: Aves; Order: Falconiformes; Family: Falconidae; Genus: Falco; Species: Falco sparverius
Family: Falconidae (Falcons and Caracaras)
- Shape
- Slightly asymmetrical, elongated, with a rounded tip. The leading edge is straighter than the trailing edge, typical of a tail feather.
- Size
- Estimated 3.5 to 4.5 inches (9-11 cm) in length. This is consistent with the rectrices of a small falcon like the American Kestrel.
- Rarity
- Common; the most widespread and abundant falcon in North America.
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Description
This feather belongs to the American Kestrel, North America's smallest falcon. Females and juveniles are characterized by rufous backs and tails with heavy black barring. Males, by contrast, have blue-grey wings and a mostly unbarred rufous tail with a single thick black band.
Colour & Pattern
Warm rufous (cinnamon-brown) base color with five distinct, dark brownish-black horizontal bands. The tip features a broad black subterminal band followed by a thin white or buffy terminal edge.
Barb Structure
Densely interlocked pennaceous barbs throughout most of the vane for flight stability; plumulaceous (downy) barbs at the base near the calamus.
Texture & Surface
Smooth, firm, and slightly glossy. The vane is stiff enough to provide aerodynamic resistance during flight and hovering.
Key Features
Warm rufous tone with multiple dark transverse bands; broad subterminal black band near the pale tip; small size (roughly 4 inches).
Habitat
Open country, grasslands, agricultural fields, deserts, and parklands. In South Dakota, they are common in the Black Hills and surrounding prairies.
Geographic Range
Widespread throughout North and South America. In Western South Dakota, they are breeding residents, with most migrating south for the winter.
Ecological Role
Secondary consumer and mid-level predator; helps control populations of large insects (grasshoppers) and small rodents. Often competes with Bluebirds for nesting cavities.
Similar Species
Merlin (Falco columbarius) feathers are generally darker/grayer with different banding patterns. Sharp-shinned Hawk feathers have different proportions and gray-brown tones.
Interesting Facts
Kestrels are known for their ability to hover (kite) in mid-air while hunting for insects and small rodents. They see ultraviolet light, allowing them to track the urine trails of voles.
Condition Notes
Good to Excellent condition. The barbs are mostly intact, suggesting it was naturally molted rather than lost in a struggle or weathered by long exposure.
Notes
Western South Dakota