AQUILINE. 41 



Young. The bill is brownish-black ; the cere greenish-yellow ; 

 the feet yellow ; the claws black ; the bases of all the feathers are 

 brownish- white ; their middle parts light reddish-brown ; their 

 tips only blackish-brown ; the head and nape are dark brown ; each 

 feather with a minute brownish-white spot on the tip ; on the 

 middle of the back and on the wings light reddish-brown is the 

 prevalent color ; the black tips of comparatively small extent ; on 

 the third part of the back there is much white, that color ex- 

 tending further from the base ; the quills and larger wing-coverts 

 are blackish-brown, with a tinge of grey ; the tail feathers brown- 

 ish-white in the centre, black towards the margins, with irregular 

 white dots ; the lower parts are of the same color as the back, 

 or are pale reddish-brown, marked with longitudinal streaks and 

 spots of dark brown ; the lower wing-coverts brown ; the tail- 

 coverts white, with light-brown tips. 



Progress towards Maturity. In the second year the young 

 exhibits little difference, being, however, of a darker tint on the 

 back and wings. An individual at this age has the bill brownish- 

 black, tinged with blue ; its base and the cere greenish -yellow ; the 

 iris hazel-brown ; the feet gamboge ; the claws brownish-black ; the 

 head and nape are dark brown ; the base of all the feathers, on the 

 upper parts, is white ; on the hind-neck and foreparts of the back 

 that color, tinged with yellowish-brown, prevails, a lanceolate or 

 obovate deep brown spot, being on each feather towards the end ; 

 on the middle of the back the brown prevails, on the hind part 

 white, and the rump and upper tail-coverts are light brown, tipped 

 darker ; the scapulars are dark brown with a purplish tinge ; 

 the wing-coverts dark brown at the end, but most of the larger 

 pale brown in the greater part of their extent ; the quills black, 

 with a purplish-grey tinge, the secondaries gradually becoming 

 more brown, and all faintly variegated with light grey and 

 brown on the inner webs ; the tail is brownish-black, with a 

 tinge of grey, and more or less finely mottled with whitish ; the 

 lower parts may be described as brownish-white, longitudinally 

 streaked with dark brown, there being a lanceolate patch of the 

 latter on each feather ; the lower wing-coverts and feathers of 

 the legs dark brown ; the lower surface of the quills bluish-grey ; 

 the lower tail-coverts white, tipped with brown ; the down on the 

 breast pure white. 



Remarks. In this species the bill and iris change from 

 dusky-brown to pale yellow, and the plumage, at first white at 

 the base, and dark brown at the end, gradually loses its white, 

 while the dark parts become paler and more extended, the final 

 coloring being more uniform. 



The tail forms no exception, for its basal white also diminishes 

 but the white, which is gradually substituted for the brownish- 

 black, spreads from near the end to the base. Macgillivray. 



The European White-tailed Sea Eagle occurs along the banks 

 of the Indus ; they are mostly immature specimens, 



