The sexes do not vary in appearance, though they can be readily distinguished from each other by 
the colour of thr iris, which is chestnut-brown in the female, and black in the male; but individual members 
differ considerably in the depth of the rosy tint of the under surfaces, and the extent of the bare irides. 
I'lumage, hrensl and neck, rose-colour; crest, pale pinkish-white ; back, wings, and tail, warm ashen 
-rev outer weh of tertiary and tail leathers, dark-brown; bill and feet, very dark grey. 
Si/.r, fourteen inches. 
Habitats : Port Darwin, Porl Essington, Gulf of Carpentaria, Queensland, Interior, New South Wales, 
Victoria, South Australia. 
GENUS CALLOCEPHALON. 
rpil IS is a very curious -en us, possessing only one species, which, though nearly allied to the Calyptorhynchus 
Macrorynchus, has attributes adapted for some particular mode of existence not yet clearly understood. 
It is short and thick-set, and has a very powerful bill. The sexes are similar in colour, except for the hue 
of the filamentous crest, which is scarlet in the male, and grey in the female. 
CALLOCEPHALON GALEATUM. (Gray.) 
GANG-GANG. 
TO those acquainted with the eastern coast of Australia the discordant grating cry of the Gang-gang, as it 
breaks upon the silence without premonitory warning from some adjacent tree-top, is an experience in ugly 
sounds not easily forgotten. 
i if a gregarious disposition, these birds are usually found in large flocks, feeding upon the berries of the 
Eucalypti, but as cultivation advances they show so strong a preference for cereals that they become a very 
nightmare to Bettlers and farmers. AVhen caught young they are easily tamed, and seem as happy in captivity 
as when free, though the home is no longer among the loftiest branches of gum trees, but restricted to a cage or 
a pole, where they climb ceaselessly, gnawing at whatever comes in their way. 
In respect to nest-building, they do not adopt quite the same mode as other Cockatoos. Instead of 
diving into the gloomy depths of a perpendicular hollow they seek out a horizontal hollow in some lateral branch 
where a certain amount of light can penetrate, and there deposit two white eggs. 
This bird is very remarkable in the direct contrast and harmony of the colours of the plumage ; while 
the entire body is a brownish grey, each feather faintly fringed with white, the cheeks, head and crest of 
the male bird arc of vivid scarlet. The crest is unique, both in the crescent curve of the acuminated feathers 
which rise thickly over the forehead, and in the presence of a wavy filamentous fringe which connects the separate 
trailers with a cobwebby lightness that is very lovely; the breast tinged slightly with red during the breeding 
mi son, is at others uniformly brownish grey; beak, horny yellow; feet, dark grey. The female is slightly- 
smaller than the male, shows more white among its plumage and is generally shabbier. The crest is grey instead 
of red. 
Habitats : Wide Bay District (Queensland), New South Wales, Victoria, Tasmania. 
