AREA B 
17-21 February 1968 
This area is one of low bird density with a very high (85 percent) 
proportion of storm petrels. 
AREA C The North Equatorial Current System 22 - 24 - February f 5 April 1966 
This area comprises the North Equatorial Current and its counter- 
current. Bird densities are higher than in areas to the north and south. 
About equal numbers of shearwaters, petrels, storm petrels, and terns 
occupy this area. This was the only area with significant numbers of 
large petrels. 
AREA D South Equatorial Current 25-27 February, 2 b- 25 , 28 March, April 1 %oO 
♦ 
This area is much like area B with very low bird densities and a high 
(8b percent) proportion of storm petrels. 
AREA E Zone between South Equatorial Current and Central Pacific 
Water Mass 28 February, lb-lo March, 20-23 March 1908 
This is an area of water-mix, with patches of water having varying 
salinities and temperatures. It has very high bird densities and the 
largest concentration of Sooty Terns recorded for the trip. 
AREA F Central Pacific Water Mass 29 February to 13 March 1968 
This area has a very low bird density. Sooty Terns were the most 
abundant species, but almost equal numbers of shearwater/petrels, storu 
petrels and tropicbirds were present. 
AREA G Galapagos Islands Area 17 , 19 > 26 March 1968 
The Galapagos Islands' birds, chiefly the Galapagos tjiorm Petrel-and 
the Swallow-tailed Gull, predominate in this area. 
AREA H Coastal . 6-8 April 1968^ 
Boobies (8b percent) are predominant in this southern coastal area. 
SPECIES ACCOUNTS 
Only those species for which there is additional information aie 
included. For the others see the Tables by area. 
WEDGE-TAILED SHEARWATER 
One dark phase collected 
All Wedge-tailed Shearwaters seen south of the equator (except two 
near the Galapagos) were dark phase birds, indicating that 'cheese a^e oirde. 
breeding in southern islands, probably the Marquesas. Birds seen north of 
the equator were almost evenly divided between dark and light pnase, with 
a few more light phase than dark. Most of these birds were ooserved in 
the high bird density areas of the equatorial currents. 
