TABLE 2 -continued 



TABLE 2 - continued 



Region 



Species 



Number Birds 

 Per Hour Peril) Per 



Linear Km 10 Km 



Region Species 



petrel 

 Wilson's/Madeiran 



storm-petrel 

 White-tailed tropicbird 

 Red-footed boob) 

 Brown booby 

 Great frigatebird 

 Northern shoveler 

 Lesser golden-plover 

 Sharp-tat led/pectoral 



sandpiper 

 South polar skua 

 Parasitic jaeger 

 Unidentified skua 

 Black-naped tern 

 Sooty tern 

 Brown noddy 

 Unidentified noddy 

 White tern 



0.02 



0.01 



0.04 



V Streaked shearwater 

 Wedge-tailed shearwater 

 Unidentified shearwater 

 White-tailed tropicbird 

 Lesser golden-plover 

 Black-naped tern 

 White tern 



VI Wedge-tailed shearwater 

 Great frigatebird 

 Red-necked phalarope 

 Pomarine jaeger 

 Unidentified tern 

 Unidentified gull/tern 



VII Masked booby 

 Brown booby 

 Unidentified frigatebird 

 Red-necked phalarope 

 Pomarine jaeger 

 Parasitic jaeger 

 Unidentified skua 

 Caspian tern 



Bridled tern 

 Crested tern 

 Unidentified tern 



from May to June on Christmas Island in 1965 (Clapp, 1967) 

 but from August to November on Caroline Atoll ( Kepler el ai. 

 Subchapter 1 .2. this volume) data indicated an egg peak from 

 August to November. Other species disperse variable distances 

 from their colonies during the breeding cycle. The case of 

 Audubon's shearwater {P. Iherminierl) was particularly 

 interesting. Generally seen within ISO km of its breeding 

 grounds, we found a bird 1,100 km away from its nearest 

 known colony. Christmas Island, but approximately 400 km 

 from Maiden, a little-known island that has unexplored potential 

 habitat for Audubon's shearwaters. Our data also included 

 range extensions of resident breeders. Forexample, the wedge- 

 tailed shearwater, the most abundant shearwater in the Pacific. 

 has rarely been recorded west of 180° in the Caroline Islands 

 (Micronesia). Philippine Sea. and southeast Asia, yet 849! of 

 our sightings (N = 245) occurred in this area. 



b) Nonbreeding visitors . These seabirds tend to be highly 

 seasonal in their postbreeding movements. We observed birds 

 that breed from the arctic to the antarctic. Forexample. Cook's 

 petrels {Pterodroma cooki) breed on islands in temperate 

 waters of the South Pacific, then undergo long transequatorial 

 migrations into tropical and north temperate waters to spend 

 their austral w inter. Because of the enormous distances of such 

 migrations, and because the distributions of birds are still 

 poorly known in some regions, our data added range extensions 

 for Kermadee petrel [P. neglecta) and little shearwater 

 (P. assimilii I. 



229 



