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Eurasian Eagle-Owl
Primary flight feather, likely P6-P8

Eurasian Eagle-Owl

Kingdom: Animalia, Phylum: Chordata, Class: Aves, Order: Strigiformes, Family: Strigidae, Genus: Bubo, Species: Bubo bubo

AI-generated identification · may be incorrect

Family: Strigidae (Typical Owls)

Shape
Symmetrical vane with a broad, rounded tip and velvety specialized fringe on the leading edge
Size
Approximately 10 to 12 inches long, consistent with a large wing flight feather from a major apex nocturnal raptor
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Description

The Eurasian Eagle-Owl is one of the world's largest and most powerful owls, characterized by prominent orange ear tufts, brilliant bright orange eyes, and powerful talons. This magnificent flight feather features the classic velvety modification common to owls, allowing them to hunt silently in total darkness.

Colour & Pattern

Rich tawny-brown base with distinctive, bold dark brown to blackish transverse bars and fine vermiculations across the vane

Barb Structure

Modified pennaceous structure with velvety pile and fringe-like barbules designed for silent flight; minimal hooklets at edges, intact barbs with slight fraying at the tip

Rachis & Barb Pattern

Sturdy, pale ivory-colored, slightly curved central rachis with high-density barbs angling outwards at a uniform slope, featuring regular dark brown horizontal banding

Texture & Surface

Remarkably soft, velvety, and matte texture covered with a fine downy pile across the surface to dampen sound during flight

Feather Placement

Wing (primary flight feather) determined by overall curvature, robust central shaft, and specialized serrated leading edge characteristic of owl primaries

Key Features

Large size, striking bold dark brown and tawny-buff banding, pale robust rachis, and the specialized velvety texture on the upper surface for silent acoustic flight

Habitat

Rocky mountainous areas, cliffs, coniferous forests, taiga, and open semi-deserts with rocky outcrops

Geographic Range

Widespread across much of Eurasia, spanning from Western Europe (including Spain) eastward across Russia and Asia to the Pacific coast

Ecological Role

Acts as an apex avian predator regulating populations of small to medium-sized mammals and birds, serving as a primary indicator of healthy, undisturbed ecosystems

Similar Species

Long-eared Owl (Asio otus) and Tawny Owl (Strix aluco), but both are significantly smaller with shorter, narrower flight feathers

Interesting Facts

Eurasian Eagle-Owls are apex nocturnal predators capable of taking prey as large as hares, foxes, and other raptors. Their unique asymmetrical ear openings allow them to pinpoint prey entirely by sound.

Cultural Significance

Historically associated with wisdom, mystery, and occult folklore in European cultures. Feathers are sometimes collected by researchers and naturalists under strict regulation.

Field Identification Tips

Look for large, boldly barred brown and buff owl feathers with a velvety texture near cliff faces, rocky outcrops, or large roosting pine trees in mountainous or forested terrain

Condition Notes

Good condition with minor wear at the extreme distal tip, intact rachis, and well-preserved coloration showing typical sun-exposure tones

Notes

Found in Aragón, Spain, the texture of the feather is softer, with a slight fluff covering the entire feather in the front side