Learn About Eurasian Eagle Owls. The size of the territory will depend on each pair, based on the number of prey, the density of neighbouring pairs and the rate â¦ It has a wingspan of up to 138-200 cm and measures 58-75 cm long. They are also found in wooded steppes, taigas, grasslands, semi-deserts, and rocky coastlines. Blakistonâs Fish Owl â (Bubo blakistoni) Weight: 6-8.8 pounds Wingspan: 6.5 feet Physical Description. Owls are no exception, and within their species is one of the most majestic bird species in history: the Eagle Owl. To see from side to side the owl has to turn its head, which it can rotate almost 270 degrees around. The Eagle Owl is a large and powerful bird. The Eagle Owl is a group of birds in the taxonomic genus Bubo.They are closely related to the great horned owl and the snowy owl.. Females weigh 1.75-4.2 kg (3.9-9.4 lbs) and males weigh 1.5-3.2 kg (3.3-7 lbs). Eurasian eagle owls have powerful feet that are superior hunting tools. The Eurasian Eagle Owl is the largest owl in the world when taking into consideration its wingspan, which is up to six and a half feet. Eurasian Eagle-Owl. There are 15 different species of these owls, however, the best-known species is the Eurasian Eagle Owl (which weâll call the âEurasianâ). Each individual member of the Eurasian Eagle Owl population has its own unique set of vocalizations, and you can determine which owl is calling by the distinct sound of its voice. The Eurasian Eagle Owl (Bubo bubo) is a species of horned owl resident in much of Europe and Asia. The Eagle Owls eyes are fixed and as such do not move. In each of the species there is one that stands out from the rest. Eurasian eagle owls are the largest owls in the world and are known for their large orange eyes. The largest one being the Eurasian eagle owl which can even reach a size of 60-71 cm long and an average weight of about 4.5 kg. These owls prefer suitable rocky terrain, and can survive at elevations up to 2,000 m in Europe, and 4,500 in Asia. Owl flight feathers have a downy fringe which reduce the sound produced during flight, allowing owls to be silent hunters. Eagle owl, (Bubo bubo), bird of the family Strigidae (order Strigiformes), characterized by its large size (often 70 centimetres [about 2.3 feet] long), two tufts of feathers on the head (ear tufts), and large orange eyes. The overall coloration is tawny, mottled with brown, lighter below. The eagle owl roosts and breeds within â¦ The Eurasian Eagle-Owl particularly inhabits cliffs that are surrounded by a small number of trees. The smallest owl is the Elf owl which is as 13.5 cm and weighs about 31 g.