xvi CONTENTS. 



GAVI^E. 



Hydrochelidon nigra. Black Tern . . 516 



leucoptera. White-winged Black Tern 522 

 Jiylrida. Whiskered Tern . . .527 

 Sterna anglica. Gull-billed Tern 



caspia. Caspian Tern . . 536 



cantiaca. Sandwich Tern . . 540 



dougalli. Roseate Tern . . 544 



fluviatilis. Common Tern . . 549 



macrura. Arctic Tern . .553 



minuta. Lesser Tern ... . 558 



,, fuliginosa. Sooty Tern . . . . 562 



Anous stolidus. Noddy Tern ..... 567 



JEema sabinii. Sabine's Gull ..... 573 



Rhodostethia rosea. Cuneate-tailed Gull . . .579 



Larus Philadelphia. Bonapartian Gull . . . 584 



minutus. Little Gull ..... 589 



,, ridibundus. Black-headed Gull . . . 594 



ichthyaetus. Great Black-headed Gull . . 609 



canus. Common Gull ..... 613 



argentatus. Herring Gull . . . .618 



,, fuscus. Lesser Black-backed Gull . . . 624 



marinus. Great Black-backed Gull . . 631 



glaucus. Glaucous Gull ..... 636 



leucopterus. Iceland Gull .... 642 



Rissa tridactyla. Kittiwake Gull .... 650 



Pagopliila eburnea. Ivory Gull .... 656 



Stercorarius catarrhactes. Great Skua . . . 662 



pomatorhinus. Pomatorhine Skua . . 668 



crepidatus. Arctic or Richardson's Skua 674 



parasiticus. Long-tailed or Buffon's Skua 680 



