JUNE 1965 





J* 



: 



• 1 bird 



• 5 birds 



• 25 birds 



• 100 birds 



• 400 birds 



Sightings varied more with time of day and 

 length of time the ship spent near Oahu, where 

 the species breeds or roosts year round, than 

 with actual variation in the size of population. 



The lower numbers observed between Octo- 

 ber and March may have been the result of a 

 reduction in population in the area during the 

 nonbreeding season. 



Distribution : Only 1.7 percent (66 of 3,937) of 

 all Brown Noddies observed were more than 

 50 miles from land. No bird was seen farther 

 than 300 miles from land. 



Black Noddy 



Anous tenuirostris (Temminck) 



Status: Abundant local resident. 



Months 



Year 



196A 



1965 



The large numbers of Black Noddies recorded 

 in April 1964 were 10 miles from the island of 

 Hawaii, along the precipitous shores of which 

 this species breeds in fair numbers. Only one 

 bird, in December 1964, was found farther than 

 50 miles from land. 



White Tern 



Gygis alba (Sparrman) 



Status: Common resident. 



Months 



Year 



1964 



1965 



No indication of a population peak can be 

 determined from monthly fluctuations in num- 

 bers. The population of White Terns in the 

 area was believed to be nearly constant from 

 month to month. The fact that no bird was seen 

 inApril 1964 was probably attributable as much 

 to chance as to an actual population decrease. 



57 



