Animal Species:Powerful Owl

The Powerful Owl is Australia's largest owl.

Powerful Owl on branch

T Churchill  © Australian Museum

Standard Common Name

Powerful Owl

Identification

The Powerful Owl is a large owl with a relatively small head and a rounded tail. It is dark grey to dark grey-brown above, with white barring, and off-white below, with distinctive dark v-shaped chevrons. The eyes are yellow, set in a dark grey/brown facial mask. The legs are feathered and the yellow to orange feet are massive, with sharp talons. The sexes are alike but the female is smaller, with a narrower head. Juvenile birds are downy white on the head and underparts, the underparts are sparsely streaked, and they have much shorter tails than the adults. Powerful Owls are the largest of the Australian nocturnal birds (night birds).

Size range

50 - 60 cm

Similar Species

Rufous Owl

Distribution

The Powerful Owl is endemic to eastern and south-eastern Australia, mainly on the eastern side of the Great Dividing Range, from south-eastern Queensland to Victoria.

Habitat

The Powerful Owl is found in open forests and woodlands, as well as along sheltered gullies in wet forests with dense understoreys, especially along watercourses. Will sometimes be found in open areas near forests such as farmland, parks and suburban areas, as well as in remnant bushland patches. Needs old growth trees to nest.

Seasonality

Sedentary.

Feeding and Diet

The Powerful Owl is a carnivore, eating mainly medium to large tree-dwelling mammals, particularly the Common Ringtail Possum, Pseudocheirus peregrinus, and the Great Glider. It will also take roosting birds and sometimes small ground-dwelling mammals such as rabbits or small marsupials. It forages mainly in trees, swooping down on prey and taking prey with its feet.

Communication

Deep, double hoot: 'woo-hoo', with male's generally deeper than female's.

Mating and reproduction

The Powerful Owl mates for life (over 30 years in some cases) and pairs defend an all-purpose territory year-round. The male prepares the nest, which is usually a vertical hollow in a large old tree, and provides the female and young with a constant supply of food during the early part of the nesting period. The female incubates the eggs and broods the young, emerging later in the nesting period to hunt for food as well. Young birds remain with the parents for several months after fledging and may stay within their parents' territory for over a year.

  • Breeding season: April to September
  • Clutch size: 2, rarely 1
  • Incubation: 38 days
  • Time in nest: 55 days

 

Conservation Status

The Powerful Owl is adversely affected by land clearing, but can live in fragmented habitats such as farms or suburban areas. Sometimes killed by cars. Young birds are sometimes killed by foxes, cats or dogs.
 

Classification

Species:
strenua
Genus:
Ninox
Family:
Strigidae
Order:
Strigiformes
Class:
Aves
Phylum:
Chordata
Kingdom:
Animalia

What does this mean?

References

  • Higgins, P.J. (ed) 1999. Handbook of Australian, New Zealand and Antarctic Birds, Volume 4 (Parrots to Dollarbird). Oxford University Press, Melbourne.
  • Morcombe, M. 2000. Field guide to Australian Birds. Steve Parish Publishing.
  • Simpson, K and Day, N. 1999. Field guide to the birds of Australia, 6th Edition. Penguin Books, Australia.


Ondine Evans , Web Researcher/Editor
Last Updated:

Tags BIBY, bird, birds, Powerful Owl, Owls, vertebrate, identification, Strigiformes, Strigidae, Ninox strenua,