Figure 20. — Distribution of Red-footed Booby. 



Great Frigatebird 

 Fregata minor (Gmelin) 



Status: Common resident. 



Months 



Year 



1964 



1965 



No identifiable trends in monthly fluctuations 

 of numbers of this species can be found on the 

 basis of available data. No reason can be given 

 for the apparent increase in numbers from 

 March through June 1965 and the absence of 

 such an increase in the same months of 1964. 



Distribution : Densities were greatest within 

 50 miles from land and decreased gradually in 

 direct relation to distance from land. Individ- 

 uals were observed up to 700 miles from land. 



Although the range of the Great Frigatebird 

 undoubtedly exceeds the limits of the study 

 area in all directions, only 9 of 304 birds (3.0 

 percent) were seen south of lat. 15° N., and 

 only 47 (15.5 percent) were seen in the southern 

 half of the area (south of lat. 18° N.). 



One specimen, an adult male, was collected 

 75 miles north of Oahu on July 4, 1964. 



The Lesser Frigatebird Fregata ariel was 

 not identified in the area but probably occurs 

 there occasionally. POBSP personnel have 

 identified Lesser Frigatebirds at sea as far 

 north as lat. 18° N., just west of the study area. 



Golden Plover 



Pluvialis dominica (Mueller) 



Golden Plover was seen abundantly only in 

 October 1964, at the height of its migration 

 south from Siberia to the islands of the central 

 and South Pacific Ocean. Evidence of a return 

 migration in the spring was completely lacking. 



Peak numbers were seen a month after the 

 birds became plentiful on the main Hawaiian 

 islands. The species arrives from the north in 

 August and September (Munro, 1960). 



hi 



