{12. Yellow-billed Tropic Bird (PhaZthon american- 
us). L. 30; T. 19. Ads. Bill yellow; no bars above; 
middle tail feathers lengthened. Yung. Above barred 
with black; middle tail feathers not lengthened. 
Range.—Tropical coasts; breeds in West Indies, Bahamas and Ber- 
mudas; casual in Florida; accidental in western New York and Nova 
Scotla. 
113. Red-billed Tropic Bird (‘Phaéthon wethereus). 
L. 30; T. 20. Ads. Bill red; above barred with 
black; long middle tail feathers pure white. 
Range.—Coasts of tropical America, north on the Pacific coast to 
Cape Colnett, Lower California; accidental on the Newfoundland 
Banks. Breeds on San Pedro Martir and other Islands in the Gulf of 
California.”’ (A. O. U.) ‘ 
117. Gannet (Sula bassana). L.35. Ads. White; 
head and neck tinged with straw; primaries blackish. 
Yng. Grayish brown with white spots; breast and 
belly white. Notes. A harsh gor-r-r-rok. 
Range.—North Atlantic; breeds, in America, only on Bird Rock and 
Bonaventure Islands, Gulf of St. Lawrence; winters off the coast, 
south to Florida. 
69 
Tropic Birds and Gannet. 
\mmoture. 
