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Sooty Tern 1316 
( sterna fuscata ) 
Concentrations of Sooty Terns were found in two general areas. Along 
the mouth of the Gulf of California on 22 February large numbers were seen 
feeding over tuna in mixed flocks of Townsend*s and Manx Shearwaters. Other 
lesser concentrations were recorded over turiU or sailfish north of lO^N. 
Other concentrations occurred at about 15^3 on 12 and 16 l'4arch where birds 
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were noted feeding over tuna or schools of flying fish. In the latter in¬ 
stance the flying fish were believed to be surfacing in huge numbers because < 
of submerged tuna activity. The two widely scattered concentrations (north 
and south) probably indicate birds from two different origins. 
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Fairy Tern 14 
( C-yt^is alba ) 
^'^os"^ birds were recorded as single sightings or pairs and often in 
accompaniment with Sooty Terns in feeding flocks.' All sightings were in 
the southern hemisphere from about 5*^3 southward, • 
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