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Eurasian Eagle-Owl
Secondary flight feather (Remex), likely from the mid-wing section (S4-S8).

Eurasian Eagle-Owl

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

Family: Strigidae (Typical Owls)

Shape
Broad and slightly asymmetrical with a rounded tip; the trailing edge is wide while the leading edge is more compact.
Size
Estimated at 22-26 cm in length and 5-7 cm in width, which is consistent with the large wingspan of an adult Eurasian Eagle-Owl.
Rarity
Uncommon. While widespread, their nocturnal habits and camouflage make them difficult to encounter; they are a high-value find for enthusiasts.
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Description

This is a massive owl, one of the world's largest, with a wingspan reaching up to 188 cm. The bird features prominent ear tufts and striking orange eyes, with plumage designed for perfect concealment among rocks and trees.

Colour & Pattern

Tawny-buff base with distinct dark brown or blackish transverse bars (banding); the bars are somewhat irregular and mottled, creating a cryptic camouflage pattern characteristic of the species.

Barb Structure

Pennaceous and tightly interlocked, but featuring a specialized 'fimbriate' or velvety upper surface; the leading edge contains fine comb-like fringes to dampen sound.

Texture & Surface

Extremely soft, velvety, and matte. Unlike waterbirds, it lacks oily waterproofing, appearing dry and soft to minimize air turbulence noise.

Key Features

Large size, soft 'velvet' texture for silent flight, and the characteristic broad, dark transverse banding set against a buff background.

Habitat

Found in diverse landscapes including rocky cliffs (preferred for nesting), coniferous forests, and semi-open shrublands where they can hunt.

Geographic Range

Resident throughout much of Europe and Asia. In Croatia, they are found year-round, particularly in rocky coastal regions and karst mountain areas.

Ecological Role

Top-tier predator; they help regulate populations of mammals and smaller birds, indicating a healthy and diverse ecosystem with available prey.

Similar Species

Long-eared Owl (Asio otus) feathers are similar but significantly smaller and more slender. Tawny Owl (Strix aluco) feathers have less distinct banding and more spotting.

Interesting Facts

Eurasian Eagle-Owls are 'apex predators' capable of taking prey as large as roe deer fawns or other raptors like Buzzards and Northern Goshawks.

Condition Notes

Fair to Good. There is some mechanical damage (notching) near the tip likely caused by wear or contact with vegetation, and the base show signs of natural molt.

Notes

Found in a field near a primarily evergreen forest located in Croatia, Rab

Eurasian Eagle-Owl | Feather Identifier