Long-Eared Owl
Asio otus
Overview
The long-eared owl has tall, upright ear tufts, orange eyes and mottled brown plumage.
Females are typically larger than males, at a height of 27cm to 40cm and a wingspan of 90cm to 100cm and weight of 260g to 435g. Males are 25cm to 37cm tall, have a wingspan of 84cm to 95cm and weigh between 220g and 305g.
- Found in
- Northern hemisphere
- Class
- Aves
- Order
- Strigiformes
- Family
- Strigidae
- Genus
- Asio
Conservation Status
Long-eared owls are numerous and of Least Concern, but population numbers are generally in decline. They rely on dense woodland for nesting, and open grassland for hunting, but removal of hedgerows, clearing of woodland and agricultural intensification have reduced available breeding and foraging grounds. Secondary poisoning by rodenticide used to target rats is another serious threat for all raptors. Power line and vehicle conditions can further cause owl deaths in urbanised areas.
The main focus in long-eared owl conservation lies on habitat protection and restoration, as well as responsible land management. Preservation of mixed woodland and grassland mosaics and the supply of artificial nesting opportunities support existing populations. The reduced use of harmful rodenticides in favour of wildlife-friendly pest control methods is also an important measure. Public awareness campaigns focus on highlighting the important role owls play in maintaining a balanced ecosystem that supports predators, prey and humans.
- Wild Population
- 2,200,000 - 3,700,000
- Conservation Status
- Least concern
Animal Facts
- The long-eared owl frequently uses old nests built by other birds, especially crows or magpies.
- The ‘long ears’ of the long-eared owl aren’t actually ears but feathers used for camouflage and communication.
- The long-eared owl has specialised feathers with soft, fringed edges that make their flight nearly silent and allow them to approach prey undetected.
- Long-eared owl populations living in colder northern regions migrate south in winter, while those in milder climates tend to stay year-round.
- The long-eared owl is extremely well camouflaged and tends to roost quietly in dense conifer trees during the day, often going unnoticed even when perched close to humans.
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Social & Reproduction
For most of the breeding season, long-eared owls are territorial and solitary, with pairs viciously defending their nesting areas from other owls. However, outside of the breeding period, they often gather in communal roosts in groups of up to 20 owls. These communal roosts offer protection from predators, shelter from harsh weather and help the owls find good hunting areas nearby.
The courtship and mating behaviour of the long-eared owl takes place in late winter or early spring, when males establish territories and attract females through a combination of vocal and aerial displays. Sometimes males may present food to potential mates as part of pair-bonding. Pairs remain monogamous for the breeding season, but long-eared owls typically do not mate with the same partner every year. Pairs will then search for an abandoned nest rather than building their own.
The female lays a clutch of 4 to 6 eggs on average, though clutches may range from 2 to 10 eggs in total. She incubates the eggs for around 25 to 30 days while the male provides her with food. After hatching, the chicks remain in the nest for about 3 weeks before leaving it to perch on nearby branches while still being fed by their parents. They become fully fledged at roughly 5 weeks of age and usually disperse from the breeding area by late summer.
Long-eared owls reach sexual maturity at 1 year old, though many may not breed immediately in the next breeding season if conditions are not favourable.