BLUE-FACED BOOBY 



i. Sula dactylatra Lesson 

 Blue-faced Booby 



Length about 890 mm. (35.00 in.); tail 200 

 mm. (7.90 in.). 



Male. Plumage white, including lesser wing 

 coverts, the remainder of the wings and the 

 tail, excepting middle feathers, dark brown, 

 middle feathers whitish. Iris yellow; bill green- 

 ish yellow, pinkish at base; bare skin of throat 

 and surrounding eyes lead gray; feet olive drab. 



Female. Sinrlar to male but feet bluish 

 gray; bill greenish yellow, brightening to orange 

 at base of mandible. 



Young. Head, neck and upper parts smoky 

 brown, the feathers edged with white and with 

 a collar of white across lower hindneck; chest, 

 breast and under parts white. Approaching 

 adult plumage the brown feathers are more 

 mixed with white. 



This large species is widely distributed in the 

 tropical regions and may occur on either side of 

 the isthmus singly or in association with flocks 

 of the more common species. 



2. Sula piscator (Linnaeus) 

 Red-footed Booby 



Sexes alike. Length about 710 mm. (28.00 



in.); tail 210 mm. (8.30 in.). General color 



white, the head and nape tinged with straw 



color; outer wing quills hoary grayish brown; 



no 



