Ural Owl (Strix uralensis)

Here’s a comprehensive overview of the Ural Owl (Strix uralensis), one of Europe’s most powerful and impressive forest owls. 🦉


🦉 Ural Owl (Strix uralensis)

Scientific name: Strix uralensis Pallas, 1771
Common name: Ural Owl
Family: Strigidae (True Owls)
Genus: Strix


🌍 General Overview

The Ural Owl is a large, pale grey-brown owl native to northern and eastern Europe and parts of Asia.
It is a non-migratory, resident species, occupying mature mixed and coniferous forests with open areas for hunting.

Strong and territorial, the Ural Owl is known for its fearless defense of nesting sites — even attacking intruders, including humans, if they approach too closely.


🧬 Identification

FeatureDescription
Length:50–62 cm
Wingspan:110–134 cm
Weight:500–1300 g (males smaller)
Coloration:Pale grey to brownish-grey, finely streaked with darker markings
Facial disc:Large, rounded, grey-white with darker rim — lacking ear tufts
Eyes:Dark brown (unlike yellow-eyed Tawny Owl)
Bill:Yellowish
Tail:Long and rounded, with fine dark bars (helps distinguish from Tawny Owl)
Legs:Fully feathered to the toes
Sexes:Similar in appearance, female larger

🪶 Behavior and Vocalization

  • Activity: Nocturnal, sometimes crepuscular (active at dawn/dusk).
  • Call: Deep, far-carrying hooting — a series of rhythmic notes “hoo-hoo-hoo-hoo-hoo”, slower and more resonant than the Tawny Owl’s.
  • Territory: Pairs occupy large territories year-round and defend them fiercely, especially during breeding season.
  • Flight: Silent, buoyant, and purposeful; flies with steady wingbeats and long glides.
See also  Small heath (Coenonympha pamphilus)

🌲 Habitat

  • Prefers old-growth mixed or coniferous forests with clearings, forest edges, and nearby meadows for hunting.
  • Often nests in tree cavities, old raptor nests, or nest boxes.
  • Found from lowlands to mountain forests, avoiding treeless tundra and dense urban areas.

🍽️ Diet and Hunting

  • Primarily small mammals, especially voles, mice, and shrews.
  • Occasionally takes small birds, frogs, or insects.
  • Hunts from a perch, swooping down silently on prey located by hearing.
  • Plays a crucial ecological role as a rodent population regulator.

🪺 Breeding and Nesting

AspectDetails
Breeding season:March–June
Nest site:Tree hollow, old raptor nest, stump cavity, or large nest box
Clutch size:2–5 eggs
Incubation:~28–33 days, by female
Fledging:Young leave nest after 27–35 days but remain dependent for weeks
Parental care:Male provides food; female defends nest aggressively

The female’s defensive behavior is famous — she will dive-bomb potential predators, sometimes striking people who approach nests.

See also  Tiger moth (Phragmatobia fuliginosa)

🧭 Distribution

  • Europe: Scandinavia, Finland, Baltic States, Poland, Czech Republic, Austria, Balkans, and parts of Central and Eastern Europe.
  • Asia: Extends through Russia, Siberia, to northern Japan.
  • Altitudinal range: Sea level to ~2000 m in mountain forests.

In Estonia, the Ural Owl is a resident breeder, most common in mature coniferous forests.


📉 Conservation Status

CategoryDetails
IUCN Red List:Least Concern (LC)
Population trend:Stable or slightly increasing in many areas
Main threats:Loss of old-growth forests, reduction of nesting cavities, traffic collisions
Conservation measures:Nest box programs, forest management preserving large trees and snags

🔍 Similar Species

SpeciesKey Differences
Tawny Owl (Strix aluco)Smaller, shorter tail, warmer brown tone, yellow eyes
Great Grey Owl (Strix nebulosa)Much larger, with concentric facial rings, smaller eyes
Eagle Owl (Bubo bubo)Ear tufts, orange eyes, much heavier

🪶 Interesting Facts

  • The Ural Owl’s name refers to the Ural Mountains, central to its range.
  • During snowy winters, its pale plumage provides excellent camouflage.
  • Can live up to 20 years in the wild.
  • Its silent flight and strong talons make it a top nocturnal predator.
  • Pairs often reuse the same nesting area year after year.
See also  Spotted asparagus beetle (Crioceris duodecimpunctata)

📊 Summary Table

TraitDescription
Scientific nameStrix uralensis
Length50–62 cm
Wingspan110–134 cm
Weight0.5–1.3 kg
Eye colorDark brown
HabitatMixed and coniferous forests
DietSmall mammals, birds, frogs
Breeding monthsMarch–June
Clutch size2–5 eggs
DistributionN. & E. Europe, Russia, Asia
StatusLeast Concern

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