Black tooted Albatross 



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



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



.20- 



Laysan Albatross 



.10- 



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



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



9n 



Wedge-tailed Shearwater 



o - I r- - i r- - i r 1 1 1 r- - i i 1 



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



Sooty Shearwater 



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



Slender billed Shearwater 



o 



0' 1 — I 1 — I 1 — r"" l 



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



Newell 's Shearwater 



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



Juan Fernandez White-necked Petrels 



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



WIND SPEED (KNOTS) 



Black-winged Petrel 



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



WIND SPEED (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 shown in 

 parentheses below the upper figures applies to all figures. 



87 



