APPENDIX A 



NOTES ON THE FAUNA OF OSBORN ISLAND 



BY WILLIAM BEEBE 



OsBORN Island, in honor of Prof. Henry Fairfield Osborn, is 

 the name I have given to the larger of two islands lying between 

 Hood and Gardner. While I plan later to publish the details 

 of my study of the fauna of this interesting island, I here offer 

 an annotated list of what I believe is its complete avifauna at 

 the time of my visit, with notes on other groups. I spent four 

 hours on the island in the forenoon of April 27th, 1925. The 

 configuration of the island is such that a complete census was 

 possible in this very brief time. Of the birds, there were 17 

 species, represented by 67 individuals. 



BIRDS OF OSBORN ISLAND 



1 Diomedea irrorata Salvin 



Galapagos Albatross 



Five of these flew so close to the island that they passed 

 over the rocky promontory where the sea-lions were 

 basking. 



2 Sula nehouxi Milne-Edwards 



Blue-footed Booby 



Two pairs of these birds roosting, and perhaps breeding 

 on the ledges of an inaccessible part of the cliff. 



3 Sula piscatrix xcehsteri Rothsch. 



Red-footed Booby 



Three birds flew over and one alighted for a moment 

 near the Blue-foots. 



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