FALCONIDA:—FALCONS. 167°" 
the latter scarcely marked ; rest of under parts white, sparingly 
marked with elongated drop-shaped spots ; azks blotched cr 
barred with blackish-brown ; 62/7 dull horn-b/ue, yellowish at 
base beneath ; cere, orbits, legs and feet yellow; irides dark 
brown. Length 21°5 to 22 inches; culmen 1°35; wing 14°5 
tO 25 5 tail So tarsus 2°25. 
Adult Female: Resembles the male except in size. 
Length 24 inches and over; culmen 1°5 ; wing 16 to 16°25 ; 
tail 9 ; tarsus 2°4. 
Young: Much browner above than adults, the tail less con- 
spicuously barred ; under parts more or less broadly marked 
with brown, except throat, which is only streaked ; cere and 
feet bluish-grey. May be distinguished from / gyzfalco chiefly 
by its lighter head and absence of any marked moustachial 
stripe. 
Distribution : Resident in Iceland and parts of Green- 
land, sometimes occurring as far south as the British Islands. 
Habitat: Similar to that of & candicans. 
PEREGRINE FALCON. 
Falco peregrinus TZzmst. 
Adult Male: Cvown, nape, sides of face, and moustachial 
region black; back and upper .parts generally bluish-grey, 
shading into ashy-grey towards tail, and barred with greyish- 
black ; quills blackish, tinged with grey, slightly bordered on 
external margins with white towards tips ; tail-feathers blackish, 
broadly barred with slaty-grey, darker towards tips; beneath 
white, tinged with rufous-buff, the dzeast and sides of body 
broadly barred with dusky ; chin and throat minutely streaked ; 
bill bluish, darker towards tip; cere, legs and feet yellow ; 
irides brown. Length 15 to 15°5 inches ; culmen 1°1; wing 
me tO. ne55.> tai O's > tarstis 2-1. 
Adult Female: Resembles the male, but is much larger. 
Length 17 to 19 inches; wing 14; tail 7°75. 
Immature Birds: General appearance of upper parts 
greyish-brown, most of the feathers margined with pale red- 
dish-brown: nape marked with creamy-white and blackish ; 
region round eyes and malar stripe blackish as in adult; chin 
and upper throat finely lined or spotted ; rest of under parts 
