FEBRUARY 1965 



MARCH 1965 



.*• 



: 





2£ 



I 



••y 





• Ibird 



• 5 birds 



• 25 birds 



• 100 birds 

 A 400 birds 



1^ 



: %• 





the population, since peaks seem to come more 

 frequently. 



In general. Sooty Terns preferred the north- 

 western and southeastern corners of the area. 

 The northeastern corner consistently had the 

 lowest densities. In addition to the primary 

 density centers around Oahu and in the south- 

 eastern corner, secondary centers appeared in 

 most months, although not consistently. 



Because of the tendency of this species to 

 flock in large numbers, considerable differences 

 in total numbers for any month could result 

 from the oversight of one or two large flocks, 

 and monthly trends in abundance could be 

 altered somewhat. 



We collected one specimen on July 4, 1964 

 about 75 miles north of Oahu. 



Gray-backed Tern 

 Sterna lunata Peale 



Status : Rare resident? 



On June 5, 1964 two Gray-backed Terns were 

 observed within 10 miles of Oahu. This species 

 breeds in very small numbers on Moku Manu 

 off Oahu (Richardson and Fisher, 1950). The 

 two birds observed were heading for their 

 breeding islets. 



This species undoubtedly occurred in very 

 small numbers with fair regularity, usually 

 close to land, but was not observed more fre- 

 quently because of the small size of the breed- 

 ing population. 



55 



