DESCRIPTION OF 
FALCO AUDUBONI. 
—>—_- 
Order Raptores, Tiger. 
Family Falconide, Leach. 
Subfamily Falconina, Vigors. 
Genus Falco, Linneus. 
Falco Audubon. 
Tue bill, which is curved from the base, is of a 
deep blue colour, approaching to black at the tip ; 
the upper mandible is provided with a prominent 
tooth on each side, a corresponding notch occurring 
on the under mandible, which is truncated at the 
extremity. The colour of the cere is yellow. The 
nostrils are circular, with a tubercle in the centre. 
The upper part of the head and neck are blackish 
brown, with a slight tinge of blue; the cheeks and 
a line above each eye are yellowish white, marked 
with fine longitudinal streaks of dark brown. On 
the back of the neck there is an obscure collar of 
yellowish white, spotted with dark brown. The 
back, scapulars, tertials, and upper tail-coverts are 
greyish black, tinged with blue, each feather having a 
narrow black line down the middle. The upper 
