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Eurasian Sparrowhawk (Northern Sparrowhawk)
Secondary flight feather (remige)

Eurasian Sparrowhawk (Northern Sparrowhawk)

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

Family: Accipitridae (Hawks, Eagles, Kites, and Harriers)

Shape
Slightly asymmetrical vane with a rounded tip, typical of a medium-sized raptor flight feather.
Size
Approximately 5 to 7 inches long, consistent with a secondary flight feather from a small to medium raptor like a sparrowhawk.
Rarity
Common (widespread and regularly encountered across its vast European and Asian range)
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Description

A compact, highly agile bird of prey specialized in hunting small woodland birds through dense foliage. Females are noticeably larger than males, a pronounced case of reverse sexual size dimorphism typical of the Accipiter genus.

Colour & Pattern

Pale greyish-blue or slate-grey dorsal surface crossed by distinct, dark charcoal or blackish transverse bars, with a lighter, whitish-grey ventral side and a strong white patch at the base of the inner web.

Barb Structure

Pennaceous vane with tightly interlocked barbs and barbules creating a strong, smooth surface; prominent plumulaceous base showing downy barbs near the calamus.

Texture & Surface

Smooth, firm, and matte in appearance with a rigid vane structure that provides stiffness for flight, contrasting with the soft, fluffy texture at the basal calamus.

Key Features

Striking dark transverse banding against a grey background, combined with a robust white basal downy section and strong curvature characteristic of a raptor secondary feather.

Habitat

Woodlands, forests, forest edges, agricultural land with scattered trees, and occasionally urban parks and gardens across a wide variety of wooded biomes.

Geographic Range

Widespread across the temperate and subarctic regions of the Old World, encompassing Europe, Asia, and North Africa; largely resident in the west and south, with northern populations migrating south for winter.

Ecological Role

Acts as an apex avian predator in woodland ecosystems, regulating populations of small passerine birds and serving as an important indicator of woodland health.

Similar Species

Eurasian Kestrel (Falco tinnunculus) or other small accipiters such as the Northern Goshawk (Accipiter gentilis), distinguished primarily by scale, bar spacing, and background grey tones.

Interesting Facts

Eurasian Sparrowhawks have specialized eyesight and incredible agility, capable of high-speed pursuit flights through thick forest canopies, often catching prey by surprise.

Condition Notes

Good condition; vane is intact with minimal fraying, barbs are well-connected, and there is no obvious sun-bleaching or parasite damage, indicating a relatively fresh molt.

Notes

Leon spain