Broad Feathers



                           

              Cockatoo

Describtion

The Cockatoos that originate from islands in Indonesia, the Mollucan, Umbrella, Triton, Goffin and The Lesser, Sulphur and Citron Crested, are extremely endangered due to logging activities.  In contrast the Greater Sulphur Crested, Galah and the Little Corella are from Australia where they are deemed to be pests.  Other Australian Cockatoos include the Leadbeaters and the Black Cockatoos.
http://petparrotsweb.com/images/umbrella-cockatoo-parrot.jpg

 

Diet and feeding

Cockatoos are versatile feeders and consume a range of mainly vegetable food items. Seeds form a large part of the diet of all species; these are opened with their large and powerful bills. The Galahs, corellas and some of the black cockatoos feed primarily on the ground; others feed mostly in trees. The ground-feeding species tend to forage in flocks, which form tight, squabbling groups where seeds are concentrated, and dispersed lines where food is more sparsely distributed; they also prefer open areas where visibility is good. The Western and Long-billed Corellas have elongated bills to excavate tubers and roots, and the Major Mitchell's Cockatoo walks in a circle around the doublegree (Emex australis) to twist out and remove the underground parts.
Many species forage for food in the canopy of trees, taking advantage of serotiny (the storage of a large supply of seed in cones or gumnuts by plant genera such as Eucalyptus, Banksia and Hakea), a natural feature of the Australian landscape in dryer regions.


Behaviour

Cockatoos are diurnal, and require daylight to find their food. They are not early risers, instead waiting until the sun has warmed their roosting sites before feeding. All species are generally highly social, and roost, forage and travel in colourful and noisy flocks. These vary in size depending on availability of food; in times of plenty, flocks are small and number a hundred birds or less, while in droughts or other times of adversity, they may swell up to contain thousands or even tens of thousands of birds; one record from the Kimberley noted a flock of 32,000 Little Corellas. Species that inhabit open country form larger flocks than those of forested areas. All species require roosting sites that are located near drinking sites, although many species may travel great distances between the roosting sites and feeding sites. Cockatoos have several characteristic methods of bathing; they may hang upside down or fly about in the rain, or flutter in wet leaves in the canopycape inregionsnds..



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