1114. Common Tern.
Sterna fluviatilis, Naum, Isis, 1819, pp. 1847-1818 ; Dresser, viii. p. 263, pl. 580 ; David and Oust. Ois. Chine, p. 525 ; Saunders, p. 647 ; id. Cat. B. Br. Mus. xxv. p. 54 ; Tacz. F. O. Sib. O. p. 1010 ; Blanf. F. Brit. Ind. Birds, iv. p. 318 ; S. hirundo (partim), Linn. Syst. Nat. i. p. 227 (1766) ; Audub. B. N. Am. pl. 309 ; Naum. x. p. 89, Taf. 252 ; Hewitson, ii. p. 480, pl. cxxxiii. fig. 3 ; Gould, B. of E. v. pl. 417 ; id. B. of Gt. Brit. v. pl. 70 ; Ridgway, p. 43 ; Lilford, vi. p. 17, pl. 8.
Pierre Garin, French ; Gaivina, Andorhina do mar, Portug. ; Gavina, Span. ; Rondina, di mare, Ital. ; Fluss Meerschwalbe, German ; Vischdiefje, Dutch ; Almindelig-Terne, Dan. ; Makrel-Terne, Norweg. ; Fisktarna, Swed. ; Kalatirra, Finn. ; Krashka-rashnaya, Russ.
Male ad. (England). Differs from S. macrura in having the under parts vinaceous grey, paler, the chin and cheeks white, the dark bands on the inner webs of the primaries wider and darker, and the outermost tail- feathers shorter ; bill coral-red, blackish at the tip ; legs coral-red ; iris dark brown. Culmen 1.5, wing 10.5, tail 5.6, tarsus 0.7 inch.
Hab. Europe generally, but not ranging so far north as S. macrura ; migrating south down to South Africa in winter ; temperate Asia, passing south on passage and in winter to China, India, and the Malay Peninsula ; North America from Labrador to Texas, ranging south to Bahia, Brazil, in winter ; rare on Pacific coasts.
In habits the Common Tern does not differ from the Arctic Tern, but it is less marine in the choice of habitat and is often found on rivers, lakes, and inland ponds. Its food and nest are also similar, but its note is somewhat harsher. Its eggs resemble those of S. macrura, and are also subject to con¬siderable variation, but are as a rule a trifle larger, averaging about 1.59 by 1.19.
1114. Sterna fluviatilis
1114. Common Tern.