820. Whiskeeed Tern". Hydroc7ieUdo7ihyhnda (Pallas). Very rare. S.Europe, 



Forehead, crown, and nape black ; chin and sides of neck white ; j^^^'^g^'^i^j^ija 

 belly very dark brown, almost black ; rest of plumage grey or white ; 

 under wing-coverts white ; bill dark red; legs vermilion. Length 11| 

 inches. 



321. Gull-billed Teii?^'. Sterna anglica, Montagu. Eare wand- Europe, Asia, 



erer : only to England. Africa, 



^ J o ^ America. 



Head and bill black ; lower mandible slightly angulated or " Gull- 

 billed " ; tail bluish grey. Length 13-14 inches. 



322. Caspian Tern. Sterna caspia, Pallas. Rare visitor, to England Europe, Asia, 

 , -^ Australia, 



oni.V- N. America, 



The largest of the Terns. Mexico. 



Head black ; tail white ; bill red, dark at tip ; legs black. Length 



19-21 inches. 



323. Sandwich Tern. Sterna cantiaca, J. F. GmeUn. Spring to 

 autumn. Breeds as far north as the mouth of the Findhorn. 



The next in size of the British Terns. 



Head black ; tail white ; bill black, with yellow tip ; legs black. 

 Length 15 inches. 



324. Roseate Tern. Sterna dougalli, Montagu. Spring to autumn. 

 Rarely nests. 



A very slender Tern. 



Uuderparts tinged with roseate ; primaries with tvJiife inner margins 

 to the tijjs ; tail deeply forked, about 9 inches long, outer feathers 6 

 inches longer than central; bill black, red at base; legs vermilion. 

 Length 15-17 inches. 



325. Arctic Tern. Sterna macrura, Naumann. Spring to autumn. 

 Breeds much further north than next species, and as far south as 

 Humber in Great Britain and Kerry in Ireland. 



Crown black ; below as grey as the back. First primary with the 

 grey stripe along the shaft of the inner web no broader than the outer 

 web ; bill and Tegs coral-red ; legs shorter than in next. Length 15 

 inches. 



326. Common Tern. Sterna JIuviatilis, Naumann. Spring to autumn. 

 Has bi'ed as far north as Sutherland. 



Crown black, below white. 



First primary with the grey stripe along the shaft of the inner web 

 twice as broad as the outer web ; bill and legs coral-red ; bill blackish 

 at tip. Length 14 inches. 



327. Little Tern. Sterna minuta, Linnaeus. Spring to autumn. 

 Has bred as far north as Aberdeenshire. 



Crown black ; forehead white ; rump and tail white ; bill yellow ; 

 legs bright orange. Length 8| inches. 

 Smallest British Tern. 



