'•k' •< 
- 4 - 
A moderate number of large Pterodroma and Wedge-tailed Shearwaters 
were noted as well as fairly high numbers of Leach type storm petrels. The 
north and south boundary lines of this ctirrent are probably richer in ani¬ 
mal life available to birds than within the current itself. 
AREA D. SOUTH EQIJATORIAL CURRENT VJATERS 
Time span: 4-10 March and 20-23 liarch. , 
Boundary limits: 4°N latitude to ll°-40 S latitude along 105°W longitude and 
50-30 N latitude to 2°-30'S latitude along 112°W longitude. 
« 
Low numbers of all species except storm petrels were encountered throTigh 
out. Although Leach’s Storm Petrels were abundant in this area as well as_ 
farther north, practically all of the Galapagos Storm Petrels were recorded 
here. 
area E. CENTRAL PACIFIC WATER MASS 
Tame span: 11—19 March. #0 o -1 _i*-i 
Boundary limits: 11-40 S to 20 S latitude along 105 W longitude and thence 
northwest and north along 112longitude to 2®—30 S latitude. 
This area was characterized^ and distinct from South Equatorial Curreilt 
waterSj by a deeper mixed layer, an increase in salinity and approximately 
a 1° C drop in surface temperature. 
The vast maj ority of southern hemisphere petrels were encountered with¬ 
in the bounds of this area. Red—tailed Tropicbirds and Fairy Terns also 
showed a center of abundance here. Sooty Terns and Wedge-tailed Shearwaters 
were abundant both in this area and along northern coastal waters with rel¬ 
atively none throughout the intervening waters. 
SPECIES ACCOUNTS 
(Note: only species which warrant pertinent discussion are included below. 
See Table 3 for total avifauna.) 
Pale-footed Shearwater ® 
(Puffinus carneipes ) 
Sightings were usually of single individuals. One bird was shot down 
over an oil slick, only to get up again, fly through four more patterns and 
eventually outrun the skiff# 
Pink-footed Shearwater ^ 
( Puffinus creatopus ) . , « ^ vo 
Six of the nine sightings were recorded in large maxed feeding flocks- 
on 22 Februairy at the mouth of the Gulf of California. 
/ 
