APPENDIX. 
just beginning to show, I kept this young bird until it was able to perch ; 
it had by that time thrown out sufficient feathers to show that it puts on from 
the first the same plumage as the adult, only brighter, arising probably from 
the feathers being fresh and unworn ; it was very noisy, uttering frequently 
a loud sharp cry, and was most voracious, but died suddenly. Its description 
was as follows : irides dusky ; base of beak, cere and naked skin round eyes 
pale blue; tip of beak dark horn colour; feet and legs pale lemon yellow. Tail 
about half grown, greyish, barred dark brown with the tip buffy white ; 
this is generally worn off in adults. Back, wings and breast as in the adult. 
The dimensions of Urospizias mdiatus given in Vol. I. of the Catalogue of the 
Birds in the British Museum, page 160, seem to me to have been taken from 
a male instead of a female ; the latter sex is very much larger than the male. 
I give the dimensions of the two females mentioned previously, taken before 
they were skinned by myself. No. 1, shot November 11th, 1870. Total 
length 23 J inches : breadth from tip to tip of wings 53 inches, wing 17 inches, 
tail 10 inches. No. 2, shot November 12th, 1873. Total length 25| ; 
breath 54 inches, wing closed 17|, tail 10, tarsus 3|^ inches, inside claw 2 inches 
round curve. A male shot November 19th, 1872, measured 20 inches in extreme 
length, breadth 45|^, wing closed 15J, tail 9, tarsus 3 inches. Irides brownish- 
yellow, cere, base of beak and bare skin round eyes bluish lead colour, tip 
of beak black, legs and feet lemon yellow ; weight of female a little over 3 lbs. 
All the females I have seen differ from males in having the centre of the belly 
whitish, underside generally less rufous, and the central streaks broader and 
more marked than in the male. It seems probable that two is the utmost 
number of eggs laid by U. radiatus, as I have frequently observed that though 
I never found less than two eggs in the nest of Uroaetus audax, I never saw 
more than one young bird. 
“ Urospizias radiatus seems to me to differ essentially from the true 
Asturs and Accipiters, which latter it resembles in its feet, in the length of its 
wings, which are proportionately as long as one at least true Falco and Milvus : 
to show this I give the comparative dimensions of females of Ur^^spizias, 
Falco, Milvus, Astur and Haliastur taken by myself while the birds were 
fresh and noted at the time. 
Name. 
Extreme 
Extreme 
Wing closed to 
Tail. 
Sex. 
Length. 
Breadth. 
longest feather. 
Urospizias radiatus 
23^ inches 53 inches 
17 inches 
10 inches 
Female 
Milvus affinis 
m 
52i „ 
17 „ 
Hi „ 
9? 
Haliastur sphenurus 
23^ ,, 
53 „ 
17J „ 
lOi „ 
99 
Falco subniger 
22|- ,, 
49 „ 
16 „ 
9 „ 
99 
Astur approximans. 
20| „ 
48 „ 
12 „ 
10 „ 
99 
413 
