204 ' THE BIRDS OF AUSTRALIA 



The Great-billed Cockatoo. 



Calyptorhynchus macrorhynchus. 



Northern Australia. 



Very similar to C. hanTcsi, the female has the coloured part of the 

 tail mingled with yellow and scarlet. Egg measures 1.86 x 1.33 inch. 

 Often only one is laid; some eggs are longer than others. 



The Red-tailed Cockatoo. 



Calyptorhynchus stellatus. 



Central, West, and North-west Australia. 



Very similar to C. macrorhynchus, but has smaller bill and more 

 rounded crest. Bill in height 2.75, wing 14, tail 10.5, tarsus 0.7. Egg 

 (one generally) measures 2.10 x 1.46 inch. 



These birds are fairly plentiful in parts of Central Australia. 



Glossy Cockatoo. 

 G. viridis. 



Queensland, New South Wales, Victoria, and South Australia. 



The red band on the tail not across the two centre feathers. Total 

 length 19.5 inches, wing 14, tail 10, bill 1.9, tarsus 7.5. Egg (usually 

 one) measures 1.60 x 1.26 inch. 



This is the smallest of the Black Cockatoos. 



Genus Gallocephalum. 



The Gang-gang Cockatoo. 



Gallocephalum galeaium. 



South Qvieensland, New South Wales, Victoria, Tasmania, and King 

 Island. 



All the feathers, except the primaries, secondaries and tail, narrowly 

 margined with greyish-white. Total length 13.6 inches, wing 4.6, tail 5, 

 bill 1.25, tarsus 0.7. The female has the crest grey. The eggs (4 or 5) 

 measure 1.30 x 1.03 inch. 



They usually feed on Eucalyptus and other seeds and usually 

 go in pairs, and are not noisy birds; inhabit forest country 

 and nest in holes very high up. 



