THE BIEDS OF AUSTRALIA. 
transverse markings of the breast were darker and of a more arrow-shaped 
form, which markings become fainter and more linear as the bird advances 
in age. The sexes present the usual difference in size, but in colour and 
markings they closely assimilate.” 
North, in the Ausir. Mus. Spec. Cat., no. 1, Vol. III., 1911, pp. 184-186, 
gives a couple of notes only regarding the nidification of this bird ; from 
this work I have noted the following : 
“ This bird is essentially an inhabitant of the coastal districts, the 
contiguous scrubs and heavily timbered mountain ranges, but is sometimes 
found in open forest lands. Stomachs of specimens examined contained 
the remains of small birds and mammals, also lizards and various kinds 
of insects. 
“ Mr. G. Savidge’s notes about the nesting include : ‘ Astur cinereus is 
fairly plentifully dispersed in the thick scrub lands in the Upper Clarence 
River District, and its call is very much like that of the “King Parrot.” . . . 
The young birds examined were like their parents, white and grey. . . . 
The parent birds do not go away while being robbed, but fly about from 
tree to tree. . . . Mr. E. H. Lane and my son visited this nest in 1905, 
when it contained young. It has been used, to my knowledge, every season 
for many years.’ ” 
Mr. H. Barnard’s notes regarding this and the next species will be 
given under the latter, but Dr. MacgiUivray’s notes from the Emu, Vol. XIII., 
p. 149, 1914, may be here reproduced. 
“ Astur cinereus : Grey Goshawk. Astur novcehollandioe : White Goshawk. 
Mr. M’Lennan agrees with Mr. Harry Barnard in regarding the Grey and 
the White Goshawks as phases of one species. He found it, however, 
very difficult to gain information as to the mating of birds of two colours, 
and the resultant effect on the young. Like Astur fasciatus, the male bird 
is rarely seen anywhere near the nest. Many hours were spent waiting 
and watching for the appearance of the male bird, and, although fourteen 
nests containing either young or eggs came under observation, the male 
was seen only once. Eight of the females were grey birds, and six white. 
Where the male and female were seen both were grey. Only one nest 
contained a young bird : it was nearly fully fledged, and was grey, the 
parent being also grey. 
These birds began to build or repair old nests early in August, but 
no eggs were laid until October, the earliest record being on the 5th of that 
month. Nesting finished at the end of November, the only two records 
in December being of hard-set eggs or fuUy fledged young. One autumn 
nest was found to contain eggs on the 17th April. Most of the nests 
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