Eurasian Eagle Owl

The Eurasian Eagle Owl (Bubo bubo) resides over much of Eurasia and is typically referred to purely as an Eagle Owl within Europe. The population density of Eagle Owls is considered to be gradually decreasing and is also widely considered to be an endangered species reference IUCN. It is certainly the case that Eagle Owl sightings are now extremely rare in the U.K. as a whole, with only a few predominantly unofficial references to sightings in Scotland and the North of England. It is widely referenced that the White Tailed Eagle is the U.K.’s rarest bird of prey, however, it may sadly be the case that it is the Eurasian Eagle Owl. It is certainly the case that the IUCN makes no references to any resident Eagle Owls in the U.K.

EAGLE OWL DIET

Rabbits are their favored prey. They will also take other mammals such as rats, voles hedgehogs, and hares. They are also reported to have preyed on other birds such as woodpeckers and pheasant, and even smaller raptors. Indeed they will also feed on amphibians, reptiles, fish, and insects on an opportunistic basis.

The fact that they occasionally prey on other raptors has led to the consensus amongst some conservationists that they should not be allowed back into the U.K. as it may impact other sensitive species.

HABITAT

Eagle Owls favor forest, woodland & moorland habitat.

Note that this map is for a rough illustration of animal distribution across the UK, whereby the blue areas indicate unofficially recorded sightings. It is not an indication of population density.

BEHAVIOR

Nocturnal in nature, they will normally roost during the day, and hunt between dusk and dawn. The exception is when they have chicks, and they can sometimes then be seen during the day. Male & female Eagle Owls look visually identical, albeit females can be slightly larger than males. Typically Eagle Owls will pair for life, and prefer nest sites in sheltered areas along rock faces. They will also use the abandoned nests of other large birds. Females lay up to 4 eggs and incubate them for 34 days. Both the male and female take a part in rearing the young, the male being specifically responsible for bringing all the food required back to the nest. Chicks are fully fledged at around 6 months.

Eagle Owls are silent hunters and use their acute hearing and eyesight to locate and capture their prey. They can use the feathers on their face to funnel sounds to their ears to help make precise sound locations of prey.

STATS

Male adult Eagle Owls weigh up to 2.3kg and the females 4.2kg. They stand at between 58 to 71cm with a tail up to 30cm. They have an impressive heavy stance for an owl, and even more impressive is their wing span which can exceed 1m. Their feathers range from grey, brown, and black, and they have piercing orange eyes. In the wild, Eagle Owls live up to 20 years. In captivity, they can live up to 60 years.

EAGLE OWL NATURAL PREDATORS

They can be preyed upon by some of the larger mammal predators such as foxes, who can opportunistically ambush the Eagle Owl if they spend a little too long on the ground. Other than this, they have no natural predators.

CONSERVATION STATUS

The decline of the Eurasian Eagle Owl is attributable to human persecution right into the 20th century. Across Europe reintroduction programs have been underway, however, the Eagle Owl is still subject to illegal killing, as well as road deaths and diseases also taking their toll. Consequently, the population of these birds has gradually decreased.

Conservation Status

WHERE & WHEN TO SEE

It is estimated that there may only be 40 or so adult individuals in the wild. Combine this with their nocturnal habits and your chances of seeing them are pretty small. Having said that, I was lucky enough to have one of these guys gazing across at me one morning across from my house in the Highlands; so it does happen! Your best bet therefore is to view them at wildlife centers across the U.K. Here are some options:

In Scotland:

1. Highland Wildlife Park, Cairngorms (Park)
2. Blair Drummond Safari Park, Stirlingshire (Park)
   

In England:

1. Lake District Wildlife (Park)
2. Hoo Zoo & Dinosaur World (Park)
3. Shepreth Wildlife Park (Park)

REFERENCES

Map distribution data and behavioral references based on JNCC & World Owl data.

Conservation status and population based on IUCN 2016 assessment.

If you enjoyed this article, and are maybe interested in some of the photography, please check out my Eagle Owl Gallery.