Eurasian Eagle-Owl
Kingdom: Animalia, Phylum: Chordata, Class: Aves, Order: Strigiformes, Family: Strigidae, Genus: Bubo, Species: Bubo bubo
Family: Strigidae (Typical Owls)
- Shape
- Asymmetrical vane, rounded tip, with characteristic soft, velvety outer margins adapted for silent flight
- Size
- Approximately 20 cm long and 4 cm wide, consistent with a medium-large flight or wing covert feather for this species
- Rarity
- Uncommon, as they are elusive, nocturnal apex predators with large territories, though populations in Western Europe have recovered well
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Description
The Eurasian Eagle-Owl is one of the largest and most powerful owls in the world, featuring striking orange eyes, prominent ear tufts, and a mottled brown and buff plumage that provides exceptional camouflage. Known for its deep, resonant hooting calls, it is a formidable nocturnal hunter capable of taking medium-sized mammals and birds.
Colour & Pattern
Warm buff-brown background with bold dark brown horizontal bars and vermiculations, typical of raptor cryptic coloration designed for camouflage
Barb Structure
Pennaceous vane transitioning to plumulaceous base, featuring specialized velvety fringe on barbules that eliminates aerodynamic noise
Texture & Surface
Exceptionally soft, velvety, and matte texture on the upper surface due to specialized micro-structure of barbules; lacks the glossy sheen of diurnal raptor feathers
Key Features
Large size, rich buff and dark brown barred pattern, robust white-based rachis, and unmistakably soft, velvety texture designed for silent flight
Habitat
Inhabits a wide variety of habitats including coniferous forests, rocky mountainous regions, steppes, semi-deserts, and open agricultural landscapes with rocky outcrops or old trees
Geographic Range
Widespread across much of Eurasia, spanning from Western Europe (including Belgium) eastward across Russia and Asia to the Pacific coast
Ecological Role
Apex nocturnal predator that helps regulate populations of small to medium mammals (such as rabbits and rodents) and corvids, serving as a key indicator of ecosystem health
Similar Species
Tawny Owl (Strix aluco) or Long-eared Owl (Asio otus), but feathers of those species are significantly smaller and differ in precise barring density and coloration
Interesting Facts
The Eurasian Eagle-Owl possesses asymmetrical ear openings that allow for pinpoint sound localization in total darkness. Their specialized wing feathers have a comb-like fringe that muffles the sound of air rushing over the wing, enabling completely silent flight.
Condition Notes
Good condition, fresh molt, minimal wear along the edges, intact barbs, and no visible fault bars or parasitic damage
Notes
20CM long. 4cm wide found in Belgium Froid-Chapelle in August