SOOTY TERN. 339 



GULL-BILLED TERN. 



STERNA ANGLICA. 

 Genus Sterna. 



A rare straggler to our coasts ; has been obtained 

 some score of times. 



CASPIAN TERN. 



STERNA CASPIA. 

 Genus Sterna. 

 Also a rare straggler on migration. 



ROSEATE TERN. 



STERNA DOUGALLI. 



Genus Sterna. 



A bird which some years ago bred on several of the 

 islands off the coasts of Scotland and Ireland, as well 

 as on the Fame Islands and one or two others ; but 

 in all probability it does not now breed anywhere in the 

 British Islands, and must be regarded as an accidental 

 visitor. It lays its eggs on the beach in the sand; they 

 closely resemble the eggs of the Common Tern. 



SOOTY TERN. 



STERNA FULIGINOSA. 



Genus Sterna. 



This bird has very slender claims to a place in this 

 work, its occurrence on our shores being only twice 

 recorded. 



