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Slender-billed Corella

 (Cacatua tenuirostris)

Also known as: Corella, Long-billed Corella, Eastern Long-billed Corella or Cockatoo, Slender-billed Cockatoo

Click photo to visit gallery

Slender-billed Corella
© Sardaka | Wikimedia Commons

Did You Know?

The Slender-billed Corella is known to use the "sentinel warning system" which employs alert birds warning flocks of approaching danger.

Academic Research

Related publications: Cacatua tenuirostris

Species Profile

Genus: Cacatua | Species: tenuirostris

Size:

37cm (14.4 in)

Weight:

485-650g (17-22.75 oz)

Races including nominate:

one

Colour Adult:

Both adults in general white in colour; red frontal band, lores and streaking at foreneck; feather bases of head and neck red, becoming paler pink/orange on bases of feathers of mantle, upper back and breast. Eye ring bare and pale blue, covering more area under eye.  Eye dark brown.

Colour Juvenile:

As in adult but duller with less far-reaching red markings; pink/orange to bases of feathers in areas mentioned above either minimal or absent; shorter upper mandible.

Call:

Described as quavery, and high toned contact call given continuously in flight; when agitated or alarmed harsh short screech given.

Listen Now

Video Links:

Video 1 | Video 2 | Video 3

More Information:

AvianWeb
Avibase
Handbook of the Birds of the World

Content Sources:

CITES
BirdLife International
Internet Bird Collection
Parrots: A Guide to Parrots of the World, Juniper and Parr, 1998
ML Media Collection Catalogue 128309, Long-billed Corella Cacatua tenuirotstris, Macaulay, Linda, New South Wales, Australia, Oct. 10 2005, Cornell Lab of Ornithology. Site
Parrots of the World, Forshaw and Cooper, 1977. 2010 edition
Parrots of the World, Forshaw, 2006.
Parrots in Aviculture, Low, 1992.
Psittacine Aviculture, Schubot, Clubb and Clubb, 1992.

Click photo to visit gallery

Slender-billed Corella
© Sardaka | Wikimedia Commons

Did You Know?

The Slender-billed Corella is known to use the "sentinel warning system" which employs alert birds warning flocks of approaching danger.

Academic Research

Related publications: Cacatua tenuirostris

Species Care

Captive Status:

Rare

Longevity:

May live more than 50 yrs.

Housing:

Walk-in enclosure, minimum length 4.5m (14.7 ft).

Diet:

Small seed mix: canary, safflower, oats, spray millet, limited sunflower, sprouted, dry or soaked; sprouted pulses and beans, cooked butterbeans and lentils; green leaves of Swiss chard, lettuce, sowthistle, chickweed, etc; vegetables such as: carrot, celery, corn, zucchini, squash, green beans and peas in the pod; fruit such as: apple, orange, cactus fruits, banana, pear and others; nuts such as: walnuts, hazelnuts, pecans, roasted peanuts; complete kibble.

Enrichment:

Provide socialization, lots of chew toy items such as heat sterilized pine cones, wood block and vegetable tanned leather toys, unsprayed pine, fir, willow and elder branches; provide overhead misters or shallow water bowls for bathing.

Nest Box Size:

16" x 16" x 36" (40.6cm x 40.6cm x 91cm) vertical box.

Clutch Size:

2 to 3

Incubation Time:

24-25 days

Fledging Age:

8 weeks

Hatch Weight:

Not recorded.

Peak Weight:

Not recorded.

Weaning Weight:

Not recorded.

Click photo to visit gallery

Slender-billed Corella
© Sardaka | Wikimedia Commons

Did You Know?

The Slender-billed Corella is known to use the "sentinel warning system" which employs alert birds warning flocks of approaching danger.

Academic Research

Related publications: Cacatua tenuirostris

Species Wild Status

World Population:

100,000-500,000

IUCN Red List Status:

Least Concern

CITES Listing:

Appendix II

Threat Summary:

Potentially trapping for wild bird trade and persecution by farmers. Population believed to be increasing, however.

Range:

Found in SE Australia, from SE South Australia east to C Victoria and SW New South Wales. Introduced to urban centres in Australia and Tasmania.

Habitat:

Found up to 400m (1312 ft). Favour tree-lined rivers and creeks running through farmland. In particular river red-gum and bull-oak trees favoured. Also occur in open forest, savanna woodland, farm pastures, paddocks and stubble fields. Not usually found far from water.

Wild Diet:

Feed on corms, seeds, nuts, berries, roots, bulbs and insects and their larvae. Also may take sown grain and ripening crops.

Ecology and Behaviour:

Noisy and conspicuous. Roosts in trees around water sources. Flocks of up to 2000 birds may gather, outside the breeding season, to use food sources. Feeds on the ground, rooting up different foods, getting soiled and dirty in the process. Fly noisily about before settling down for the evening to roost.

Clutch and Egg Size:

2 to 3 ovate eggs, 33.0 x 25.0mm (1.3 x 1 in).

Breeding Season:

Most nesting occurs in September and October, although the season runs from July to December.

Related Links:

Wikipedia
Research: Foods of the Long-billed Corella
Research: Breeding of the Long-billed Corella at Coomalo Creek, WA

Click photo to visit gallery

Slender-billed Corella
© Sardaka | Wikimedia Commons

Did You Know?

The Slender-billed Corella is known to use the "sentinel warning system" which employs alert birds warning flocks of approaching danger.

Academic Research

Related publications: Cacatua tenuirostris

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