The Long-eared Owl could possibly win the most attractive bird award. Stunningly beautiful, but the eponymous long ears (actually feather tufts – the actual ears are hidden on the side of the head under the facial disc feathers) are not visible when the bird is flying or isn’t feeling relaxed. When seen perched, the finely speckled feathers are distinctive, along with orangey-rufous patches. The eyes are a striking orange, but the eyes are closed at roost if the bird feels threatened.
Key Facts
Common name: Long-eared Owl
Scientific name: Asio otus
Habitat: Conifer plantations, shelter belts, deciduous woodland or even scrub
Diet: Small rodents and small mammals
Size: Average 36cm, wingspan 95cm. Weight averages 290g
Status: Resident breeder. Passage/winter visitor
Population size: 1800 pairs
Conservation status: GREEN (least concern)
Appearance
If seen in flight, at dusk, the likelihood of confusion with Short-eared Owl is surprisingly high, and the wing markings are very similar. The best features to use are the lack of trailing white edge to the upper wings, and the presence of a dark ‘C-shaped’ ‘elbow’ mark below the wing, with blunt, diffusely marked wingtips. Their ‘ears’ (tufty feathers) are a good way to tell them apart from other species, however they are not seen during flight or if they feel threatened. They have speckled feathers and orange patches to match their orange eyes. Due to its elusiveness, one of the best ways of discovering Long-eared Owls is to hear the strange calls of begging youngsters during summer – sounding remarkably like squeaky gates!
Lifespan
The average age in the wild is 4 years. Adults have a 69% year-to-year survival. First year survival is just 48%. The oldest known wild bird was almost 13 years old (ringing recovery).
Nesting
Long-eared Owls are scarce and very elusive breeding birds. They favour conifers to nest in and use stick nests, often old corvid or raptor nests. Surprisingly they will readily take to nest baskets and will even nest in wicker dog baskets!
Number of eggs: 3-4
Incubation: 28 days
Fledging time: 29-34 days
Habitat and Distribution
Being such elusive and nocturnal creatures Long-eared Owls are very difficult to monitor and survey, and it is likely that there are more present than recorded. Breeding season distribution shows a northerly and easterly focus, although birds are recorded breeding over the whole country, including off-shore islands and right over Ireland, where it is much more frequent. Nesting invariably occurs in conifers, so areas of conifer plantations such as Thetford Forest in East Anglia are hotspots for the species. Despite this, in some areas Long-eared Owls will nest in shelter belts, deciduous woodland or even scrub. In winter many Long-eared Owls from continental Europe visit us, and these birds can sometimes be very approachable. Every year there are records of newly arrived birds roosting out in the open on garden fences, or other equally obvious locations. Long-eared Owls in winter tend to roost communally, often in hedges or patches of scrub.
Long-eared Owls are found right across Europe and into Asia, with northern populations ‘leap-frogging resident southerly populations, and wintering in North Africa, India and China. It is also a widespread bird in North America.
Movements
Long-eared Owl is one of the few owls that undertake long distance journeys. Most of our resident birds are sedentary, especially towards the west of the UK. In the east varying numbers of birds from continental Europe, from as far afield as Finland, visit for winter, crossing the North Sea with apparent ease – although they are often encountered resting on oil rigs and ships.
Feeding
Small rodents are the main prey of Long-eared Owls although they will take other small mammals and even small birds. Its food brings it into competition with the Tawny Owl, a bigger and more dominant species. In Ireland, where there is no Tawny Owls, it is the dominant species and can be found in many different habitats, including urban ones. Despite being a bird of woodland, much of its prey is found in open grassland and other open habitats, and Long-eared Owls habitually hunt outside of the wooded habitats they breed in.