STERNA TRUDEAUII. 



195 



This large-billed Tern, " with a slightly forked tail, but amply deve- 

 loped feet/' is occasionally seen near Buenos Ayres. 



Diirnford tells us that he found it common at Baradero in April in 

 small parties, and watched one flock for some time. These individuals 

 kept circling over a mill-pond, which evidently held a good supply of 

 small fishes ; for they constantly kept darting into the water. This 

 species, Durnford adds, has a note quite unlike that of any other Tern ; 

 it is nearly similar to the cry of the " Tero-tero" (Vanellus cayennensis) , 

 for which he had often mistaken it. 



412, STERNA MAXIMA, Bodd. 

 (GREAT TERN.) 



Sterna maxima, Set. et Salv. Nomencl p. 147 ; iid. P. Z. S. 1871, p. 667 ; 

 Sounders, P. Z. S. 1870, p. 655, et 1882, p. 521. 



Head of Sterna maxima. (P. Z. S. 1871 , p. -568.) 



Description. Crown and crested nape black ; neck, lores, throat, and tmder- 

 parts pure white ; back pale grey ; quills darker grey, with white on most of 

 the inner webs ; tail pearl-white ; bill orange ; legs and feet black : whole 

 length 18-0 inches, wing 14'5. Young : darker on upper parts. 



Hab. Coasts of America from Massachusetts to La Plata, and north- 

 wards to California. 



This large Tern seems to occur on the Rio Parana, according to Azara. 

 It is certainly found in Southern Brazil, where Mr. Rogers obtained a 

 series of specimens now in the collections of Messrs. Salvin and Godman 

 and of Mr. H. Saunders. 



413. STEENA TRUDEAUII, And. 

 (TRUDEAU'S TERN.) 



Sterna trudeauii, Scl. et Salv. Nomencl p. 147 j iid. P. Z. S. 1871, p. 570 ; JDunt- 

 ford, Ibis, 1877, p. 200 (Buenos Ayres)} Saunders, P. Z. S. 1876, p. 660. 

 Sterna frobeenii, Phil, et Landb. Wiegm. Arch. 1863, pi, i. p. 125 (Chili). 



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