EINAR LONNBERG 



Fregetta grallaria 

 Puffinus creatopus 

 Pterodroma neglecta 

 ( » externa) 



» defilippiana 



Breeding sea birds (6 sp.) 



Pterodroma externa 



» masafuerae 



Accidental visitors: 

 A. Migrants from the north (3 sp.): 



Asio flammeus Buteo obsoletus 



Crymophilus fuUcarius 



B. Visitors from the South American continent (5 sp.): 



Belonopterus chilensis 



Cathartes sp.? 



Cygnus melanocoryphus 



Haematopus ater 

 Circus maculosus 



C. Roving sea birds (5 sp.): 

 Priocella antarctica (== glacialoides) 



Daption capensis 

 Diomedea melanophrys 

 Spheniscus magellanicus 

 » humboldti 



Columba livia 

 Lophortyx californianus 



Daption capensis 



Introduced by man (2 sp.): 



Columba livia 



Uncertain: 



Eustephanus leyboldii 



The indigenous land birds are partly endemic species (Anaeretes fernande- 

 zianus, Aphrastura (Oxyurus) masafuerae, and the remarkable Eustephanus fer^ 

 nandensis) which have their nearest relatives on the neighbouring continent, 

 partly identical with continental species, although in some cases they have 

 differentiated through isolation into separate races. Of the sea birds, Ptero- 

 droma externa, defilippiana and masafuerae have been found breeding only on 

 these islands, thus being entitled to be listed as endemic species, or, at least, 

 as local races, not quite identical with such breeding on other islands. 



It is possible that further investigations will prove that still some more 

 marine birds breed in small numbers on these islands, perhaps at other seasons 



