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American Kestrel (formerly Sparrow Hawk)
Primary flight feather (Remex); likely an inner primary (P1-P4) given the level of asymmetry.

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
Asymmetrical with a narrower leading edge (vane) and a broader trailing edge; the tip is relatively pointed, characteristic of high-speed falcon flight.
Size
Estimated 4.5 to 6 inches in length. This is consistent with the primary feathers of a small falcon, where total wingspan is only 20-24 inches.
Rarity
Common; it is the smallest and most numerous falcon in North America.
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Description

The American Kestrel is a small, colorful raptor approximately the size of a Mourning Dove. Males feature blue-grey wings and a rufous back, while females are mostly rufous with heavy barring. Both sexes have distinctive black 'mustache' stripes on their faces. This feather represents the classic falconid wing structure designed for agile, swift movement.

Colour & Pattern

Slate-grey to blue-grey base color on the leading vane and tip, transitioning to a series of bold, cream-to-buff colored 'windows' or ovals on the trailing vane. This spotted/barred pattern is a diagnostic trait for many small falcons.

Barb Structure

The distal portion is pennaceous with tightly interlocked barbs for flight efficiency; the proximal base shows plumulaceous (downy) barbs for insulation. Some separation (zipper-like) is visible due to wear.

Texture & Surface

Smooth and firm texture on the pennaceous vane; matte finish with a slight waxy bloom typical of raptors. The trailing edge is softer than the leading edge.

Key Features

Bold cream-colored oval spots on the inner vane, blue-grey coloration (suggesting a male bird), and a distinct asymmetrical falconid shape.

Habitat

Open country, grasslands, deserts, parklands, and agricultural fields. They are frequently seen perched on telephone wires or hovering over meadows.

Geographic Range

Widely distributed throughout North and South America, from the tree line in Alaska and Canada to the southern tip of South America. Northern populations are migratory.

Ecological Role

Secondary consumer; they play a vital role in controlling insect and rodent populations. They are also prey for larger raptors like Cooper's Hawks or Great Horned Owls.

Similar Species

Merlin (Falco columbarius) feathers are similar but usually darker with more uniform barring; Sharp-shinned Hawk (Accipiter striatus) feathers are more rounded and lack the specific primary point of a falcon.

Interesting Facts

Kestrels can see ultraviolet light, which allows them to track the urine trails of voles and other rodents, leading them directly to their prey. They are also one of the few raptors that can hover in place while hunting.

Condition Notes

Fair to Good. There is significant 'splitting' or fraying of the barbs on the trailing vane, likely from impact with vegetation or general wear prior to molting.

American Kestrel (formerly Sparrow Hawk) | Feather Identifier