Bulwer's Petrel 



6 75 



Leach's StOfm Petrel 



0-4 5 9 10 14 15 19 20^24 25 29 30+ 



(12) (84) (302) (495) (365) (73) (5) 



0-4 5-9 10 14 15-19 20-24 2529 30 + 



(12) (84) (302) (495) (365) (73) (5) 



Red-tailed Tropicblrd 



<y> 0-4 5-9 10-14 15-19 20 24 25-29 30 + 



a: 



UJ 



030 



Great Frigatebird 



White tailed Tropicbird 



1.08 



0.8-1 



Brown Noddy 



White Tern 



0.6n 



0-4 5-9 10 14 15-19 20-24 25-29 30 + 



WIND SPEED (KNOTS) 



Sooty Tern 



0.40 



0-4 5-9 10 14 16 19 20-24 25 29 30 + 



WIND SPf-ED (KNOTS) 



Figure 32. — Number of birds per 30 linear miles (55.6 km.) of observation at various wind speeds 

 in increments of 4 knots (2 m. per second). The number of samples at each increment shovm in 

 parentheses below the upper figures applies to all figures. — Continued. 



88 



