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KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 52. N:o |7. 
Order Accipitriformes. 
Fam. Falconide. 
Circus gouldi BONAPART. 
Math. handl. n:r 254. I juv. Hot Spring, Fitzroy river !9/3 1911. 
Appeared also at Meda, where it lived at »the billabongs», and at the creeks 
in Beagle bay. It was nowhere seen in flocks, only a single or two together. 
Astur fasciatus (approximans) Vic. and HORSsF. 
Math. handl. n:r 258. 6 SS ad., 10 22 ad. Nooncanbah, Fitzroy r. !4/12, 15/12 1910, moult. (wing; new 
DUN ASS) SA RSA age Sj arire sa OTSALSYAR TONI 
Plumage. — The specimen "”/1 has an old plumage, which is without rufous 
edgings on the feathers of the upper side and because of that is darker, though at 
the same time it is paler than those of the others. 
The rufous edgings on the feathers of the back give to certain specimens a 
considerably lighter appearance. That colour is also mixed in the bars, which are 
found across the breast. But the presence or absence of this intermixture in these 
has nothing to do with the presence or absence of rufous edgings at the back. Thus 
the spec. ”/1 is the lightest one of them all, because of such edges in the back, but 
the bars across are considerably darker than in the g spec. !"/12, where, on the other 
hand, the rufous edges are very narrow; therefore all the upper-side of this spec. is 
darker than in the others (both SS) (cf. Falco lunulatus). 
Moulting. — The two spec. !'"/12, like the Jan. species, have new plumages. 
Only in the wing there are wing-feathers growing out. 
Moulting-season seems to come in Oct. or Nov. 
Ecological. — This hawk generally appeared during the summer at Nooncanbah 
(Fitzroy river). At Derby, Mowla Downs and Meda I have also seen it, and at the 
latter place even in a small flock (in May). It was not found at Sunday Island, 
nor in the month of July in Broome und Beagle bay, where other raptorials were 
very common at this time (Htieracidea ortventalis). At Mowla Downs I have found 
its nest, built at a low distance from the ground, in a little tree. There were as 
yet no eggs. 
Accipiter cirrhorcephalus VIEILL. 
Math. handl. n:r 260. 2 SS ad. Nooncanbah, Fitzroy r. !3/12 1910, moult.; SJ juv., 3 SS ad. Meda, 
Kimb. ?/s, strong moult.; !3/4, new plumage; "5/1 1911; 2 29 ad. ibid. ?/s, new plumage; ?5/s 1911. — 
1 2 ad. Beagle bay, Kimb. !$/7 1911, faded plumage. 
