PHAETHONTIDAE 
Red-billed Tropicbird (Phaethon aethereus ): 9« All but one were 
observed within ca. 250 miles of the coast. The exception was also the 
farthest south and was recorded at 10 ° 05 'N by 097 ° 33 'W. 
Red-tailed Tropicbird (Phaethon rubricauda ): 1 6 . In^contrast to 
the above species all sightings, with one exception, were over 250 miles 
from the coast. Apparently this species is most abundant in, or just 
north of, the Countercurrent. One bird, hbwever, was recorded at 05°S 
by 115°W. 
White-tailed Tropicbird (Phaethon lepturus ): 1. One individual 
was recorded in the countercurrent at ca. 10°N by 104.6°W. 
SULTDAE 
Blue-faced Booby ( Sula dactylatra ): 31• All but five were within 
500 miles of the coast of southern Mexico, and three of these were within 
300 miles of Clipperton Island. The species was found south to 04°l6'N 
and west to 109°W. The most pelagic of the individuals recorded were 
all first-year birds. 
Brown Booby (Sula leucogaster ): 7^1. Strictly a coastal species 
found from 20°N south at least toAcapulco, Mexico. 
Red-footed Booby (Sula sula ): 43. , Restricted to eastern areas 
(east of 105°W). One light-phase adult was recorded at l8°05'N by 
105°W, and ;one sub-adult light-phase at 09°30'N by 097°33'W. The 
rest were all first year birds. 
Blue-footed Booby ( Sula nebouxii ): 2?. Several birds were seen in 
the coastal waters off Manzanillo, Colima, Mexico which may have been 
this species. 
PHALACR0C0RACIDAE 
Eighteen cormorants were observed in the waters around Cedros Island, 
Baja California. All appeared to be Brandt Cormorant (Phalacrocorax 
penicillatus ) although none were observed close enough for positive 
identification. 
FREGATIDAE 
Magnificent Frigatebird (Fregata magnificens ): 7• All recorded 
along the coast from 16 ° to 25 °W. 
Great Frigatebird ( Fregata minor ): 3• Although only three individuals 
were identified, 24 others were recorded within the Countercurrent area, 
with maximum density along Longitude 097•5°W. All of these probably belonged 
to this species. 
