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American Kestrel (Sparrow Hawk)
Primary flight feather (Remex)

American Kestrel (Sparrow Hawk)

Kingdom: Animalia, Phylum: Chordata, Class: Aves, Order: Falconiformes, Family: Falconidae, Genus: Falco, Species: Falco sparverius

Family: Falconidae (Falcons and Caracaras)

Shape
Asymmetrical, elongated, and pointed toward the distal end. The leading edge (outer vane) is much narrower than the trailing edge (inner vane), which is typical for secondary or inner primary flight feathers to assist in aerodynamic lift and steering.
Size
Approximately 4.5 to 5.5 inches (11.5–14 cm). This size is highly consistent with the primary or secondary feathers of a small raptor like the American Kestrel.
Rarity
Common; it is the most widespread and smallest falcon in North America, though populations have seen declines in certain regions recently.
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Description

This is a flight feather from North America's smallest falcon. The American Kestrel is a colorful raptor, roughly the size of a Mourning Dove. Males feature blue-grey wings (matching this feather) and rufous backs, while females are primarily rufous with heavy barring. They are known for their habit of perching on wires and hovering over fields.

Colour & Pattern

Slate grey to blue-grey ground color with distinctive, large oval white spots on the inner vane. This 'spotting' or partial banding is a hallmark of kestrel wing plumage, especially visible in males and juveniles.

Barb Structure

Pennaceous and tightly interlocked along the upper two-thirds, providing a stiff surface for flight. The base becomes plumulaceous (downy) near the calamus (quill) for thermal insulation.

Texture & Surface

Smooth, stiff, and matte. The surface is streamlined to reduce air resistance, with a slightly waxy feel common in raptors for water resistance.

Key Features

Blue-grey base color with bold, white oval spots on the trailing vane; small size for a raptor feather; stiff flight-ready structure.

Habitat

Open country, grasslands, meadows, deserts, and urban areas. They require open space for hunting and cavities (natural or man-made boxes) for nesting.

Geographic Range

Widely distributed across North and South America, from Alaska and Canada to the southernmost tip of South America. Most North American populations are migratory.

Ecological Role

An essential secondary consumer and meso-predator, controlling populations of large insects, small mammals, and occasionally small birds.

Similar Species

Merlin (Falco columbarius) feathers are similar but usually darker with more linear banding rather than distinct white ovals. Sharp-shinned Hawk (Accipiter striatus) feathers have different color tones and broader banding.

Interesting Facts

Kestrels are one of the few raptors that can see ultraviolet light, which allows them to track the urine trails of voles and mice across fields like a glowing map.

Condition Notes

Fair to Good. There is significant fraying and separation of the barbs ('zipped' barbs becoming 'unzipped') along the lower trailing edge, suggesting this may be a molted feather that has spent time on the ground or suffered moderate wear.

American Kestrel (Sparrow Hawk) | Feather Identifier