40 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. IO7 



Pacific birds (Birds of Australia, 1915, vol. 4, p. 309). In comparing 

 the male birds from Guam and Peleliu, the former ones are larger in 

 appearance and in wing and culmen length. These specimens are 

 probably representatives of breeding populations, and it is quite 

 possible that such breeding populations at different islands might 

 show some size variations. All the birds appear to be in good physical 

 condition. Two of the birds from Peleliu were orowin"' the elongated 





"Cs 





COLLECTING LOCALITIES 



-t- 



FiG. 9. — Collecting localities in the Palau Islands. 



central tail plumes when collected. Weights of the five males from 

 Guam: 267-321 (294). 



At Guam, tropic-birds were seen at three localities, each of these 

 being high, rugged, coastal cliffs : Amantes Point, Anao Point, and 

 Orote Peninsula. Most of the birds were observed at Amantes 

 Point, where 20 individuals were counted on May 24 flying in and 

 out of large fissures located about 250 feet above the beach. This 

 place was visited several times from May to July, and birds were 

 seen on each occasion. It was not discovered whether the birds were 

 nesting; however, four males taken on June 11 had enlarged testes. 



