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U. S. p. R. R. EXP. AND SURVEYS — ZOOLOGY — GENERAL REPORT. 



List of specimens. 



Dysporus, Illiger, 

 SULA FIBER, (Linnaeus.) 



Booby Gannet. 



Pdecamts fiber, Linn Syet. Nat. 1766, 218. 

 Pelecanus mla, Linn. Syst. Nat. I, 1766, 218, 7. 



Dysporus mla, Ilmger, Prod. 1811, 279. — Bon Cone. Av. II, 1655, 164. 

 Sula brasilienm, Spix, Av. Bras. 1824, tab. 107. 



Sulafusca, Vieill. Gal. des Ois. 1825, tab. 277.— Bon Syn. 1828, No. 360.— Nutt. Man. II, 1834, 500.— Aud Orn. 

 Biog. Ill, 1835, 63.— Ib. Syn. 1839, 311.— Ib Bird's Am. VII, 1844, 57; pi. ccccxxvi. 



Sp Ch. — Head, neck, and upper plumage brown; breast and abdomen white; bill and naked part around the eye and on the 

 the throat yellow ; wings brown ; first and second primary equal and longest. 



Adult. Head, entire neck, back, wings, and tail dusky brown ; under plumage and lower tail coverts pure white; bill bright 

 yellow, flesh colored towards the end; naked space around the base of the bill yellow; iris white; tarsi and feet, with their 

 webs, pale yellow ; claws white. 



Length, 31 inches ; wing, 16.50 ; bill, 3.90 ; tarsi, 1.70 , tail, 8.50. 



The female is similar in plumage to the male, but smaller. 



The young are of an uniform greyish brown, the lower parts being rather lighter ; the bill dusky ; the tarsi aud feet dull 

 yellow. 



Hah. — Gulf of Mexico. Atlantic coast from Georgia southward. 



The Booby Gannet is found only on our southern coast, where they collect at their breeding 

 places in large numbers ; their nests are built on low trees or bushes. Their method of pro- 

 curing food is similar to that of the common species. 



List of specimens. 



