
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
- Highly asymmetrical vane; elongated and tapered with a distinctly pointed tip. The leading edge (outer vane) is significantly narrower than the trailing edge (inner vane).
- Size
- Approximately 4 to 5 inches (10-13 cm) in length. This is consistent with the primary flight feathers of North America's smallest falcon.
- Rarity
- Common; it is the most common and widespread falcon in North America.
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Description
This feather belongs to the American Kestrel, a pint-sized raptor known for its colorful plumage and ability to hover while hunting. Males have blue-gray wings, while females are rufous with black barring. Both have two black 'mustache' stripes on their white faces.
Colour & Pattern
Boldly patterned with alternating dark slate-gray (to brownish-black) and creamy-white to buff spots or 'windows' along the inner vane. The outer vane is dark and relatively solid. This 'spotted' look is diagnostic for kestrels.
Barb Structure
Tightly interlocked pennaceous structure throughout most of the vane for flight efficiency, becoming plumulaceous (fluffy) only near the very base of the calamus.
Texture & Surface
Smooth, stiff, and somewhat glossy on the upper surface. The vane is firm and holds its shape well when flexed, typical of a falconid flight feather.
Key Features
Distinctive 'toothed' or spotted pattern on the inner vane; small size for a raptor feather; strong asymmetry; slate-gray primary coloration.
Habitat
Open country with short vegetation and few trees, including grasslands, meadows, deserts, parklands, agricultural fields, and urban areas with open lots.
Geographic Range
Widespread across North America, from near the tree line in Alaska and Canada through the United States, Mexico, and Central America into South America.
Ecological Role
Secondary consumer; acts as both a predator of insects and small mammals and occasional prey for larger hawks and owls. They are excellent biological pest controllers.
Similar Species
Merlin (Falco columbarius) feathers are similar but usually darker with less distinct spotting; Peregrine Falcon feathers are much larger and usually show more barring than spotting.
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's most active paths.
Condition Notes
Good to Fair condition. There is noticeable separation in the barbs on the trailing edge (zipper-like effect is broken), suggesting it may be a naturally molted feather that has experienced some wind or environmental wear.