Eagle owl bird is a massive owl, weighing up to 4kg. It has long, prominent ear tufts, orange eyes, a large, powerful bill and a rather plain facial disc. The upperparts of eagle owl bird are tawny or greyish-brown, boldly patterned with black centres to the feathers, and the underparts are buff with heavy black streaks on the breast that fade into narrow streaks on the belly. Flies with powerful wingbeats interspersed with glides, looking like a large raptor with a huge head.
A resident species, found at low densities in mountains, forest and wilderness areas across a wide spread of latitudes. Eagle owl bird favours broken terrain with rocky areas, cliffs, quarries, ravines, open wooded areas, mature coniferous forest, scrub, grassy country and tracts of semi-desert with rocky outcrops; it may also be found on the margins of urban areas at rubbish dumps or even on large buildings such as football stadiums! Although probably not native to Britain, introduced or escaped birds started breeding in the wild from around 1996 onwards, often with devastating consequences for the local wildlife!
The advertising and territorial call given by the male is a deep powerful "OOh'oh" or "OO'o-oo", with the stress on the first syllable, rising slightly, audible at great range and repeated every 8-12 seconds. Eagle owl bird is variable in pitch. The female gives a hoarser, less audible and higher-pitched version, which is also used territorially. When agitated and excited they make a rapid gibbon-like "ou'ou'ou'ou'ouh", with a similar hollow-sounding tone. Other calls are a rather hoarse and screeching "aerrh!" or "rhaeh!", given by the female, and a harsh Heron-like barking "kwa-kwa-kwa!" alarm call. Young birds call with a rasping and slightly ascending "hrrrkh".