Spotted Eagle Owl (Bubo africanus)

Stompy The Raptor Foundation

The Spotted Eagle Owl is one of the smallest of the Eagle Owls. On average they weigh around one quarter of the weight of the largest of the Eagle Owl family, the Eurasian Eagle Owl.

The Spotted Eagle Owl is found throughout most Africa south of the Sahara, with the exception of very dense forests. Up until 1999, it was considered that there were two subspecies of Spotted Eagle Owl found in Africa, but one of the subspecies, (Bubo africanus cinerascens), is now treated as a separate species, the Vermiculated Eagle Owl (Bubo cinerascens). In Africa there is now only one subspecies, (Bubo africanus africanus), and there is a second subspecies, (Bubo africanus milesi), is that is found found in the southern western parts of Arabian peninsula.

The Spotted Eagle Owls hunt predominantly at dusk, spending most of the day concealed in trees, on rock ledges or even in burrows of other animals. They will take a large variety of prey, from small mammals, birds in flight, reptiles, scorpions, crabs, frogs, bats & insects. They are often seen hunting around streetlights in towns, which is where insects, & consequently bats hunting insects, tend to congregate at dusk. When preying on insects, it is necessary for the owls to eat a very large number, as they are quite small & take a lot of effort & energy to catch. Despite this, mainy Spotted Eagle Owls live on a diet of predominantly insects. When preying on mammals, the Spotted Eagle Owls will usually use the technique of still hunting, often catching the prey on the ground with a single steep swoop from their perch. If the prey is energetic, the Spotted Eagle Owls will often chase the prey for considerable distances. Investigations into the birds that the Spotted Eagle Owls prey on show a large variety, including terns, hornbills & even Lanner Falcons (Falco biarmicus). Basically, the Spooted Eagle Owls are very versatile when it comes to prey, feeding off anything they are able to catch, which enables them to survive fluctuations in prey populations.

Spotted Eagle Owls usually mate for life. They usually nest on the ground or in disused nests in trees, though they have also been known to lay eggs on window ledges of large buildings. When nesting & incubating the eggs, most of the defence of the nest site is done mainly vocally, rather than by attacking. Their breeding season starts in July and lasts until late January or early February (as they live in the Southern Hemisphere, this corresponds to late winter/early summer breeding seasons of the owls in the Northern Hemisphere). 2 to 4 eggs are normally laid, and the female does all of the incubation, rarely leaving the nest, except to feed on prey brought to it by the male. Incubation takes around 30 to 32 days. At around 7 weeks from hatching, the young are able to fly competently, often following their parents calling loudly for food. The young are dependant on their parents for up to 5 weeks after learning to fly.

Given sufficient food in their territory, Spotted Eagle Owls may start breeding at 1 year old. As with all of the birds of prey, they suffer fairly high mortality rates in their first year of life, but if they survive that first year, then they are likely to live around 11-12 years in the wild..

Spotted Eagle Owls do not have a tendency to avoid populatd areas, and many of their deaths are as a consequence. Quite a lot of their hunting is done by the sides of roads & many are killed by collisions with vehicles. Another cause of deaths is flying into, or becoming trapped by, fences & overhead cables. But by far the largest cause of deaths of Spotted Eagle Owls in Africa is pesticides, many of which are banned in Europe and America, such as DDT. Their natural predators include amongst other things, the Osprey.

IUCN Red List Status :

Least Concern (LC)

Also Called :

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