8 
Common (?) Tern Total Observations - 5 
One bird on 8 June and four birds in the Gulf of Panama were of the 
Arctic/Common/Forster type but since Common is the bird most likely to be 
in these waters the observations are almost surely of this species. The 
Panama birds were in nonbreeding plumage. 
Sabines Gull Total Observations - 10 
A pair and a group of six birds were in the coastal feeding areas on 
5 June. A pair was observed inside the Gulf of Panama; no dark heads were 
noted on these birds. 
Ring-billed Gull Total Observations - 1 
( Larus delewarensis ) 
A single bird with remanents of dark on the head but otherwise adult 
plumaged was attracted to the ship off western Panama. 
Xantus (?) Murrelet 
During a nocturnal watch, north of Guadalupe Island, several (10 t) 
Alcids were seen in an hour's time. It is presumed to have been this species. 
Marine Mammals 
Porpoises and whales were frequently seen from the Gulf of California 
south to Coast Rica. The Gulf of Tehuantepec was particularly rich. 
Nightly from 5 “10 June porpose were seen riding the bow wave. 
One seal/sea lion sp. was seen 60 miles northwest of Guadalupe Island. 
Further information and complete sightings can be found in the original 
log sheets. 
Turtle s ' 
Sea Turtles (Green?) were common on 4 June off Cabo Corriente. Many 
(5/hr.) were sunning in the calm ocean. About one-half of the sightings 
were noted with birds perched on the exposed carapace. Black Terns and 
Brown Boobies were seen riding. Turtle sightings diminished slightly on 
5 June and after that only one turtle was seen (ll June). A clasping pair 
was seen and approached in the skiff on 5 June. Evidently a pair in 
coitus cannot dive. While attempting to noose them, manipulation with a 
boat hook finally broke the males hold and both dove. 
