The Sea-birds breeding in the Eastern North Atlantic south of the 

 Bay of Biscay and in the Mediterranean. 



* mainly fresh water and estuarine. ** Morocco only. 



Of the four main groups of these Atlantic islands, Madeira and 

 the Cape Verdes have probably the largest sea-bird communities, 

 with ten or a dozen species each. One tubenose, the North Atlantic 

 great shearwater, Puffinus diomedea, nests on all of them as well as on the 

 Berlengas of Portugal. Bulwer's petrel, Bulweria bulwerii, and the little 

 dusky shearwater, Puffinus assimilis, also nest on all four island groups. 

 The Madeiran fork-tailed petrel, Oceanodroma castro, nests on all but 

 the Canaries. The Manx shearwater nests on the Azores and Madeira, 

 but not yet farther south. The little storm-petrel reaches south to 

 the Canaries (although in small numbers and probably to these Atlantic 

 islands only). The rather rare soft-plumaged petrel, Pterodroma mollis, 

 is believed to nest on Madeira; it does so on the Cape Verdes. The 

 beautiful frigate-petrel, Pelagodroma marina, breeds on the Salvages 

 (which belong to Madeira but are nearer the Canaries), the Canaries 

 and the Cape Verdes. 



The red-billed tropic-bird, Phaethon aethereus, the brown booby 

 and the frigate-bird (man-o'-war bird) do not appear farther north 

 than the Cape Verdes. Here the cormorant, which had dropped out 



