EAGLES AND HAWKS. 39 



Genus V. FALCO. FALCON. 



Bill short, very strong, its sides convex, its upper out- 

 line curved from the base, the edge of the upper mandi- 

 ble with an angular process near the tip ; nostrils round, 

 with a central papilla; tarsi short, covered all round 

 with scales ; wings long, pointed, the second quill long- 

 est. P. 148. 



HEAD OF FALCO PEREGRINUS, 



1. F. ulandicus. Gyr Falcon. — Wings much shorter than 

 the tail; the old birds pure white, or white with dusky- 

 spots ; the young grey. P. 152. 



2. F. peregrinus. Peregrine Falcon. — Wings nearly the 

 same length as the tail. Adult bluish-grey above, white 

 beneath, the breast transversely spotted, the head, and a 

 band on the cheek, black. Young blackish-brown above, 

 the breast reddish, with longitudinal dark spots. P. 159. 



8. F.Subbuteo. Hobby. — Wings longer than the tail. Male 

 greyish-black above, whitish beneath. Female dark brown 

 above, reddish-white beneath ; both with mystachial patches 

 and longitudinal dark markings on the lower parts. P. 182. 



4. F. vespertinus. Orange-legged Falcon. — Wings of about 



