STRUCTURE AND SEA-BIRDS OF THE N. ATLANTIC 



^V^' h-ory-guti . .JN 



/ ; in . ti cifeUers eider 

 '^little auk tfpsss gu/J ^^Smev 



'ing - eider ^„^--''^^~'~---.,^9 <; er hlackback 



Fomarine skua ,.-<f , ,, , t ,. ^\^ ^ ^/.^/„^ 

 , , , Z^ Red- threaded diver ^-^-^—ocoter 



Iceland X Black-throaied diver \. Men' 

 'ooded i'"" y/ Great northern diver \^^uU 



^ I oahines /Slavonian grebe Rednecked grebe \ 



S"ii /Fulmar long - tailed dm-k Eider \^'^ 



Velvet-scoter Goosander Red- breasted meryt 

 flM / Grey phaloTope Red-necked phalarope 



Arctic skuxt Long -tailed skua Great black-bark 

 Glaucous gull Kitiiwake Arctic tern 



Razorbill BriianicKs guillemot Guillemot 



'^3 



** / scoter 

 Ring-billed 



Forster's 

 tern 



American 



white 



pelican 



leacti 

 petreb 

 Black^ 



tern 

 Gannei. 



Storm- 

 petrel 



Little gull 



Black guillemot 



Common 

 tern 



Puffin 



Herring-gull 

 J?ormorani 



Vj 



Gull-billed tern 

 Roseate tern 

 Sandwich 

 tern 



laugh 

 /gull 



Cahow /Pied-bille> 

 I grebe — 

 iBrown pelican-^ 

 I Douhle-crestedy^ 

 I cormorant ^ 

 iMexican. cormorant 



duhods s kearwat^!]\ 

 American ^ Noddy 

 ^ dartei^^ ' -^ 

 ^^lack 



"^skimmerX 

 "-^..^ 



Blue faced booby 



.Red-footed booby 



*P \ 

 '^i^\Large -billed tern 



Little tern 



Royal tern 



iaiUd J 

 c birg^ 



jvptc^ 



Black- necked 



grebe iDaS 

 -, . chick 



5 Jbreat 



tern /crestedgrci 



y'orfhAt/antic 

 shearwater 

 , 'Bulwer's petrel 

 Frigate petrel 

 -*—LiUle shearwaler, 

 Madeiran 



storm-petrel 

 Scft-plumage^ 

 - .peivelf£^^_ 



cormorant 



Whiskered 

 tern 



Black- headed 

 gull 



Cayenne tern 



White -capped 



Red-billed tropic-bird 

 Brown booby 

 Kan - a- war bird 



ddy 



^^Whife 

 pelican 



^ pelican 

 •^^^^ African y ■^ 



^ ^ darter /^ 

 African skimmer y^t^ 

 Grey-headed 



Fig. -zh 

 Actual species. Arrows point to replacement species or to nearest 



ecological counterparts 



Rynchops fiavirostris) . The terns of the genus Chlidonias are primarily 

 lake and marsh species throughout their range. In North America 

 the gulls Lams pipixcan and L. Philadelphia are purely inland species 

 in the breeding season, and the tern Sterna forsteri and the pelican 

 Pelecanus erythrorhynchos almost so. In South America the terns Phaetusa 

 simplex and Sterna superciliaris are purely river-species. 



One hundred and eleven species of primary and thirty-two of 

 secondary sea-birds have been identified by competent observers at 

 sea or on some shore in the North Atlantic since 1800: a total of one 



