Rufous owl
| Rufous owl | |
|---|---|
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Strigiformes |
| Family: | Strigidae |
| Genus: |
Ninox Gould, 1846 |
| Species: | N. rufa |
The rufous owl (Ninox rufa), also known as the rufous boobook, is a species of owl in the family Strigidae. It was described in 1846 by John Gould, an English ornithologist. Its common name reflects the rufous-coloured feathers that these owls are covered with in adulthood. While it is uncommon, the species has a wide range, including Australia, Indonesia, and Papua New Guinea.
The rufous owl is a large owl species, ranging in weight from 700 to 1,700 g (25 to 60 oz), depending on gender and age. It is only slightly smaller than the largest owl in Australia, the powerful owl (Ninox strenua), which typically weighs between 1,050 and 1,700 g (37 and 60 oz). The rufous owl is a generalist nocturnal predator and generally solitary. It is seldom aggressive to humans except in situations in which it feels its nest or offspring are threatened.
The rufous owl is a large bird, often growing 46–57 centimetres (18–22 in) in length, with a wingspan of 100 to 120 centimetres (39 to 47 in). Females typically weigh 700–1,050 g (25–37 oz), while the males typically weigh 1,050–1,300 g (37–46 oz). Both sexes have relatively small heads compared to their body and tail, but the head of the male is flatter and broader than that of the female. Juveniles are much smaller, usually 49–54 mm (1.9–2.1 in) long at birth, and are covered in downy white pelage. The forehead, neck, back, and upper wings of the adults are usually a dark reddish-brown with light brown barring scattered throughout. The face is dark brown, and the neck, breast and underparts are rufous with thin cream bars. The underside of the wings are light brown with thick cream bars. The hooked bill is light grey and is surrounded by black bristles at its base. It has golden-yellow eyes.
The five subspecies differ slightly in size and colour. They include:
Ninox rufa has a wide geographic range. It is native to the Aru Islands, New Guinea and northern Australia, where it is found in Arnhem Land, the northern Kimberleys, the eastern Cape York Peninsula, and the Mackay District of eastern Queensland. It is the only exclusively tropical owl in Australia. The global population size of Ninox rufa has yet to be determined, but the species is considered uncommon to rare.
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Wikipedia