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Northern Phalarope 
( Lobip^s lobatus ) 
This species can be identified by its dark, striped back. The 
main wintering grounds are off of Peru and Chile, I feel that very 
few Northern Phalaropes wintered in this area, and the vast majority of 
Phalaropes can be attributed to Red Phalaropes, 
Pomarine Jaeger 
( Stercorarius pomarinus ) 
Pomarines are the only species of Jaeger wintering commonly in 
the Northern Hemisphere. Large concentrations were found along the 
coast and in the shipping lanes. This species, like gulls, has learned 
to follow ships early in the morning and late in the afternoon to 
receive scraps for their respective meals, A few birds still exist 
to the high seas by stealing fish from terns. Notes were taken on 
one Jaeger catching a Stom Petrel, 
Parasitic Jaeger 
( Stercorarius parasiticus ) 
Although not common, this species occurs regularly in the 
tropical seas off of Central America. Birds were associated with 
Sooty Tern flocks or found singularly. One individual was observed 
chasing a young Red-tailed Tropicbird, 
Young birds are very difficult to separate from young Pomarine 
Jaegers. Size, flight, and broadness of the wing are helpful, but most 
individuals must be logged as Jaeger sp > 
The dominant adult color-phase present was dark. 
Gulls: 
Laridae 
All gulls recorded on this cruise were observed on the first day, 
after leaving San Diego. For purpose of simplicity they^^can be divided 
into two categories; coastal ship following species, and'pelagic 
species. 
The first category includes California Herring and Western Gulls 
in which the adults of all three species werejbhe most important group. 
The second group contains the Black-legged Kittiwake and the 
Sabine Gull, Immature Kittiwakes outnumber the adults about 5 to 1, 
Two immature Sabine Gulls represent one sighting and were of usual 
oocurrence in this area at this season. The main wintering population 
of Sabine Gulls is at the Humboldt current off of South America, 
Q 
