198 allkn's naturalist’s library. 
back, rump, upper tail-coverts, and tail much clearer blue- 
grey, with narrow cross-bars of greyish-black, these bars being 
of the same width to the extremity of the tail ; lores and fore- 
head whitish ; crown of head grey, mottled with black ; the 
sides of the head from behind the eye and the nape varied with 
whitish ; cheek-stripe, feathers under the eye and on the upper- 
line of the ear-co\'erts, as well as the sides of the neck, greyish- 
black ; the rest of the face whitish, with median lines of black 
on the feathers ; wing-coverts like the back ; quills dark brown, 
externally mottled and freckled with grey, not forming regular 
bars, the inner secondaries exactly like the back ; under sur- 
face of body w'hite, the throat unspotted, the chest longitudi- 
nally streaked with black, widening out towards the apex of 
the feather; rest of the body rather scantily spotted with grey- 
ish-black, taking the form of bars on the flanks, under tail- 
coverts, and axillaries ; under wing-coverts white, with black 
markings, scarcely equivalent to bars ; bill blue, black at tip ; 
feet yellow ; iris dark brown. Total length, 20 inches ; cul- 
men, 1-3; wing, 14-5; tail, 8-o ; tarsus, 2-0. 
Adult Female.— Slightly darker, and a little larger than the 
male. Total length, 21 inches culmen, 1-4 ; wing, 15-0; tail, 
9'5 ; tarsus, 2-15. ’ 
Young. — Brown, tvith fulvous spots and mottlings on the edges 
of the scapulars and inner secondaries, and rather more dis- 
tinct on the upper tail-coverts ; tail dark brown, with imperfect 
bmtds of fulvous ; wing-coverts and quills externally dotted 
with minute fulvous spots, the latter internally barred with 
buff; head brown, mottled with bufify-white on the eyebrow, 
cheeks, sides of neck, and especially on the nape and hind- 
neck ; under surface of body white, with central dark brown 
patches on each feather, those narrower on the throat • bill 
horn-blue, yellow at the base of the lower mandible ; feet grey. 
Characters. — The adult male of the Gyr-Falcon is wonderfully 
like an adult Peregrine, except that the latter has always a 
darker shade towards the end of the tail, which is never seen 
in a Gyr-Falcon. 
The Norwegian race of the Gyr-Falcon is always distin- 
guished by its dark head. It has, of course, barred flanks like 
