34 AQUILINA. 
stripe ; on the abdomen many of the feathers get a fawn-colored 
spot towards their tip, anda tint of the same color pervades 
portions of the vent-feathers and lower tail-coverts. 
“ Later, again, the whole head, nape, and sides of neck become 
a warm fawn brown, all the feathers now showing narrow, 
blackish shaft stripes. The lower parts are still chiefly white, 
but almost all the feathers of the breast and abdomen have a 
more or Jess triangular brownish, fawn-colored spot at the tip, 
and show a tendency toa dark shaft stripe ; and in some birds 
at this time several of the feathers of the lower throat have 
conspicuous narrow black shaft-stripes. 
“ The sides become fawn-brown, though the feathers still are 
mottled white at the bases and the shafts are darker ; the thighs, 
vent-feathers, and lower tail-coverts are now a warm, but brown- 
ish fawn color, somewhat irrecularly barred with white ; the 
tail has now only four bands besides the subterminal one, which 
has become conspicuously broader. (Sometimes the young bird, 
before exhibiting any black streaks on the side of the neck or on 
the throat, become nearly uniform warm fawn color on the entire 
lower surface, and even retains this plumage until it has acquired 
the adult tail.) 
“Then (to return to the normal stage of progression) the 
black striping of the head, back, and sides of the neck, becomes 
more conspicuous; a black central throat stripe begins to be 
indicated, the warm fawny tint of thighs and vent becomes re- 
placed by a wood-brown, the black shaft stripes of the breast 
become more oval, and the tail begins to approach the normal 
type with only three transverse bars besides the subterminal 
one. 
“Gradually the brown of the vent and flanks creeps up to the 
lower breast ; the breast spots grow larger and larger, and _ ulti- 
mately the white margins of the feathers almost wholly assume 
the brown tint of the abdomen. The entire white chin and 
throat have the feathers so broadly striped, centrally, with black, 
that only just enough white peeps through to give indications of 
separation between a black throat stripe, and two broad black 
moustachial stripes. 
“The brown of the head and sides of the neck, though still 
warm, has lost the fawny tinge of the younger stages, and the 
black centres of the feathers have greatly increased in size. 
“The tail has a very broad terminal band, of say 1°8 and inter 
space of 2,and three other bands each about an inch broad. 
The crest, quite black and untipped, grows to a great length. 
While these changes have been going on the whole upper 
plumage has been growing darker. 
“As to the white tipping to the crest this is very irregular, the 
youngest birds and the oldest generally want it; birds of inter- 
mediate stages generally have it.” 
The Crested Hawk Eagle is confined to the hilly tracts of the 
