32 AQUILIN &. 
mandible strongly festooned ; wings moderate, fifth quill longest, 
tail long, nearly even ; tarsi long, strong, but not thick, feathered 
to the toes; toes large, unequal; claws very large, sharp and 
well curved; the inner-toe and claw, and hind-toe and claw, 
especially very large. 
Nisaetus fasciatus, Viecll. 
33.—Nisaetus bonellt, Tem.—Jerdon’s Birds of India, Vol. I, 
p. 67; Butler, Deccan, &c. ; Stray Feathers, Vol. IX, p. 373; 
Guzerat, Stray Feathers, Vol. IIT, p. 446; Murray’s Vertebrate 
Zoology of Sind, p. 77; Hume’s Scrap Book, p. 189. 
THE CRESTLESS Hawk EAGLE. 
Length, 27 to 29; expanse, 64 to 68; wing, 18°5 to 20; tail, 
11 to 13; tarsus, 3°75 to 4; bill from gape, 2:1 2:2. 
Bill greenish-horny, black at tip; irides bright yellow, pale 
brown in the young bird ; feet pale greenish-yellow. 
Adult: above dark hair-brown, with usually some white about 
the head and back of neck; quills dusky-black ; tail slaty-grey- 
ish, with about seven narrow dark bars, and a broad subter- 
minal one ; beneath white, with dark brown mesial streaks on 
the feathers of the lower part of the abdomen; thigh-coverts, 
tarsal feathers and vent nearly brown, the feathers centred 
darker, and the thigh-coverts, tarsal feathers, and under tail- 
coverts more or less banded with white, or with rufous in some 
In some old birds the entire ground color of the lower parts 
is rufous-brown. 
The young bird is pale brown above, pale rufous or ferruginous 
beneath, in some nearly white; tail pale greyish-brown, with 
dark bars. 
With each successive moult the white or ferruginous becomes 
purer white and the dark central stripe to each feather increases 
in size, more especially on the lower part of the abdomen. 
The Crestless Hawk, or as some prefer to call it, Bonelli’s 
Eagle, occurs throughout the region, but is nowhere com- 
mon. It nests on ledges of rocky cliffs, which are often 
very difficult of access, owing to their choosing a site under a 
projecting crag. Thenestis a huge affair composed of sticks, 
sometimes measuring four or five feet in diameter ; the egg 
cavity is lined with green leaves; the eggs, two in number, are 
moderately broad ovals, measuring 2°75 by 2; they are of a 
pale greyish-white color, sometimes unspotied, but are generally 
thinly marked with yellowish or reddish-brown spots. They are 
seldom, if ever, richly marked. 
Genus, Limnaetus, Vigors. 
Bill short, high at the base, curved, hooked at the tip, with 
a prominent festoon in the upper mandible ; wing short ; tail long, 
square ; tarsi long, moderately strong, feathered to the base ; 
