Calyptorhynchus funereus

CACATUIDAE

Yellow-tailed Black-cockatoo

Description
It is easy to identify mature males from females. Mature male birds (Age?) have a pink ring of skin around the eye. Females have a slightly larger yellow cheek patch, and a grey eye ring. Immature birds (up to 4 years old) look similar to adult females. Keen observers will notice smaller cheek patches on immature males. Both sexes have the striking yellow tail panels for which the species is named.

Feeding
Major food sources are seeds and nuts from native trees such as Banksia, Eucalypts, Hakea and Xanthorrhea. Pines in plantations and elsewhere are also a favoured source of food, with the birds congregating in trees to access the pine cones. They also search and consume wood boring insects.
Breeding
In the northern part of their range they generally breed between March and August. Birds in the south start breeding around October, until April.  Males and females both work to prepare the nest hollow, usually very high in a large mature tree, which they line with wood chips. The hen incubates the eggs on her own and the male goes out to forage for food for them both, which he regurgiates to the female as he returns to the nest site.  The two eggs are incubated for approximately 28 days.  Two chicks often hatch but usually only one survives. Yellow-tailed Black Cockatoo chicks have a relatively long weaning period. They fledge from the nest at around 11 weeks, and from then on remain with the parents for up to 6 months. These young birds will often constantly perch near the feeding parents and utter a constant harsh rasping sound.
Calls
The contact call is a drawn-out "kee-ow". Some screeches are also given.
Resources
http://www.yellowtailedblackcockatoo.com
http://www.birdsinbackyards.net/species/Calyptorhynchus-funereus

More information can be found on Wikipedia http://en.wikipedia.org/wiki/Calyptorhynchus_funereus

 


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