• Ibird 



• Sbirds 



Figure 17. — Distribution of Red-tailed Tropic- 

 bird. 



• 1 bird 

 <» 5 birds 



Figure 18. — Distribution of Blue-faced Booby. 



Blue-faced Booby 



Sula dactylatra Lesson 



Status : Uncommon visitor January-June; absent 

 July- December. 



Months 



Year 



1964 



1965 



Blue-faced Boobies were observed in small 

 numbers every month from January through 

 June. The species was apparently absent from 

 the area from July through December. It was 

 not possible to determine a population peak 

 because of the small sample size. 



Distribution : Only 6 of 45 Blue-faced Boobies 

 were found north of lat. 15° N. (fig. 18). Prob- 

 ably three seen 200 miles north of Oahu were 

 from the leeward Hawaiian chain and the rest 

 were from the Line Islands. 



Every bird observed had immature or sub- 

 adult plumage except one that appeared to have 

 adult plumage. 



45 



