3 
Sooty Shearwater Number recorded: 1 
One Sooty was recorded, with reliability 0, on 8 August in the 
northeast corner of the grid. The birds were common outside the grid 
in this areaj this bird represents a straggler from the coastal popu¬ 
lation. 
Cook's Petrel Number recorded: 1 
One bird was recorded flying over the oil slick generated by the 
dead Blue Whale at 3^°33'N - 126°29'W in Sector 1 of the Grid. An 
additional Cook's Petrel was seen one minute after leaving the grid at 
Point Oak and could be included for all practical purposes. 
As the concentrations of birds seen on the southern leg of the - 
grid during EGS 10 were flying northwest it is probable that they passed 
through to the grid area between EGS 10 and EGS 11. 
Storm Petrels Number recorded: 400 
Number collected: 15 
4 
W-R birds 178 
D-R " 15 
Storm Petrels 207 
Storm Petrels, all believed to be Oceanodroma leucorhoa comprised 
52 percent of the observation during this survey. The presence of dark- 
rumped forms is not accurately indicated by the 15 birds recorded. As 
Chandler stated in report on Survey 10, many of the birds recorded as 
storm petrels were undoubtedly dark rumped birds. These dark rumped 
birds probably represent birds from the Coronados or San Benitos of the 
, I 
• I |y P i « 
chopminli race. The possibility still exists that some of the dark- 
rumped birds that are not observed well are Ashy Petrels ( Oceanodroma 
homochroa) . 
While working in the skiff on 17 August attempting to recover a 
