Tropic Birds and Gannet 



i 1 2. Yellow-billed Tropic Bird {Tkaethon american- 

 us). L. 30; T. 19. Ads. Bill yellow; no bars above; 

 middle tail feathers lengthened. Yng. 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 

 Scotia. 



113. Red-billed Tropic Bird {Thaethoncethereus). 



L. 30; T. 20. Ads. Bill red; above barred with 

 black; iong middle tail feathers pure white. 



Range. — Coasts of tropical America, north on the Pacific coast to 

 Cape Coinett, 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. Notes. A 

 harsh gor-r-r-rok. 



Range. — North Atlantic; breeds, in America, only on Bird Rock and 

 BDnaventure Islands, Gulf of St. Lawrence; winters off the coast, 

 south to Florida. 



I mmaTure. 



