25 
Blue-footed Booby 
(Sula nebouxii ) 
This is a coastal species with all 
mainland. 
sightings along the ^^exican 
Blue-faced Booby 3 
( Sula dactylatra ) 
The few birds sighted in equatorial current waters at remote distances 
from land could come from any of a number of origins. 
Brown Booby 1019 
(Sula leucogaster brewsteri) 
Great niorabers of this species were recorded along the Mexian mainland 
north of Fianzardllo. On 31 ^‘arch they were abundantly encountered with 
Laughing Gxills and lesser numbers of Sooty Terns feeding over small groups 
of sailfish. The white-headed adult males of this race are distinguishable. 
‘ / . 
Red-footed Booby 31 
( Sula sula ) 
Most birds noted were dark plun^ged iinmatures. Sightings ranged out 
to about 400"^ miles from the ^"^xiean coast. One immature was collected 
over an oil slick. 
Frigatebirds 10 
The few coastal sightings were presumed to represent the Magnificent 
Frigatebird ( Fregata mac^nificens ). One imraature of as yet undetermined 
species was collected at 2^-30^^^; 105^V/ on 4 March. . The nearest land from 
this position is roughly 500 miles (Clipperton Island) and about 900 miles 
to the Galapagos Islands. 
Red Phalarope ( Phalaroous fulicarius ) 14 
Northern Phalarope ( Lobipes lobatus ) 81 
unidentified phalarope sp. 267 
Phalaropes were found in large flocks along the baja California coast 
and Mexican mainland and scattered small numbers were encountered through¬ 
out the entire cruise as far south as 20^3. I believe that the majority 
of sightings were of Red Phalaropes. Five specimens of this species were 
collected. One taken on 20 ^arch was molting into the breeding plumage. 
Pomarine Jaeger ( Stercorarius porrarinus ) 37 
Parasitic Jaeger (Stercorarius parasiticus ) 3 
Pomarines were common along the Mexican mainland coast and a few were 
encountered to lO^S. Most of these were in general areas of Sooty Tern 
concentrations. Two Parasitic ^aegers were recorded with a small group of 
Juan Fernandez Petrels at 12^3 and another was sighted at 12^N. 
Gulls (Larus sp.) ^ . 
All gulls were recorded along coastal areas. V/estern and California 
Gulls were common along the Raja California coast and Laughing Gulls were 
most abundant along the Mexican mainland north of Manzanillo. ne specimen 
each of Western arid ‘^aughing Giflls were collected* 
