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Eurasian Sparrowhawk (Common Sparrowhawk)
Flight feather (Remiges), specifically a primary feather from the wing, likely P3 or P4 based on the degree of emargination.

Eurasian Sparrowhawk (Common Sparrowhawk)

Kingdom: Animalia, Phylum: Chordata, Class: Aves, Order: Accipitriformes, Family: Accipitridae, Genus: Accipiter, Species: Accipiter nisus

Family: Accipitridae (Hawks, Eagles, and Old World Vultures)

Shape
Asymmetrical vane with a distinct narrowing (emargination) on the leading edge. The tip is rounded, and the overall profile is elongated and slightly curved to facilitate lift during flight.
Size
Approximately 14-18 cm in length. This matches the typical range for a medium-sized Accipiter primary feather.
Rarity
Common. It is one of the most frequently encountered birds of prey in Central Europe.
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Description

This feather belongs to a small, agile bird of prey known for its short, broad wings and long tail. The Eurasian Sparrowhawk is a specialist hunter of small birds. The adults show a blue-grey back and barred underparts (rufous in males, grey in females). This specific primary feather's bold banding is a classic 'Accipiter' trait.

Colour & Pattern

Dark brownish-grey (sepia) ground color with 5-6 distinct horizontal cream-to-white bars (bands) on the inner web. The leading edge (outer web) is darker and more solid. The underside is paler than the upper surface.

Barb Structure

Tightly interlocked pennaceous barbs providing a rigid, aerodynamic surface. The lower base near the calamus shows some plumulaceous (downy) barbs for insulation. Barbules are intact with functional hooklets.

Texture & Surface

Smooth, stiff, and slightly glossy on the upper surface. The vane is highly rigid to withstand air pressure during the hawk's rapid, flapping-and-gliding flight style.

Key Features

Distinctive brown and white banding, asymmetrical vane for flight, and a clear notch (emargination) on the outer web which is a diagnostic feature of hawk primaries.

Habitat

Found in varied woodland habitats, including coniferous and deciduous forests, as well as gardens, parks, and urban areas where small bird prey is abundant.

Geographic Range

Resident and migratory throughout Europe, Asia, and North Africa. Highly common across the Czech Republic year-round.

Ecological Role

Apex predator of small woodland and garden birds. They play a vital role in maintaining the health of songbird populations by removing the weak and sick. They are sensitive to environmental toxins and serve as bioindicators.

Similar Species

Northern Goshawk (Accipiter gentilis) feathers are larger and heavier. Common Kestrel (Falco tinnunculus) feathers have more spotted or different banding patterns and lack the same degree of primary emargination.

Interesting Facts

The Eurasian Sparrowhawk exhibits extreme sexual dimorphism; females can be up to 25% larger than males, allowing the pair to hunt different-sized prey and reduce competition between them.

Condition Notes

Excellent condition. The barbs are well-aligned, suggesting a relatively fresh molt. There are no visible fault bars (stress lines) or significant wear at the tip.

Notes

Czech republic