Rapaces — Diurnz. 
FALCONIDAE. 
Genus—F arco. (Linneus.) 
Generie Characters —Head and neck covered with feathers; 
beak hooked and generally curved from its base; cere coloured, 
more or less hairy at its base; nostrils lateral, rounded, or 
ovoid. Tarsi covered with feathers, or with glossy scales. Toes 
four; external toe often united at its base by a membrane to 
the middle toe; claws pointed, very much hooked, mobile and 
retractile. Vertebre twelve. 
Sub-genus—F'auco. (Bechstein. ) 
Sub-generte Characters.—Beak short, and bent from its base; 
upper mandible with one, rarely two teeth; legs robust; toes 
strong, long, and armed with curved and sharp claws; tarsi 
short; wings long, first and third quill feathers of equal length, 
second quill feather the longest. 
NORWEGIAN |. JER-FALCON. 
Kaleo Gyr-falco Norvegicus. 
Falco Gyr-falco, Scutrcet. Revue, 1844. 
Lanarius, Linnzvs; Faun. Suec., p. 
22, No. 62. 
