Mottled Ft trel 
Two individuals were seen on the eighteenth; one was travelling south and 
the other to the southwest. Apparently the migration through the grid is 
virtually over after October. 
Leach's Storm Petrel 
One Leach’s Petrel was collected on the night of the 17th after it flew 
onto the ship. In addition, eleven storm petrels identified only as white-rumped 
storm petrels were probably Leach's. Distribution seemed to be fairly random 
throughout the grid area. 
White-tailed Tropicbird 
This Hawaiian Island breeder was present in the grid in low numbers. 
Distribution was fairly even throughout the survey, with single birds fishing 
without regard to other species. 
Red-tailed Tropicbird 
This species was fairly evenly distributed over the survey area with the 
exception of an unusually high density in the northwest portion of the grid. The 
lower population from last year is not explained, but the small difference does 
not seem significant. One bird was collected November 23, and a serum sample obtained 
The fact that none of the tropiebirds had orange streamers is suggestive 
of the probability that those present in the grid were not on JohnstonAtoll 
this year (a large percentage there were color marked). This docs not mean, 
however, that the birds are not Johnston-oriented as a streamer wears off in 
less than a year and the birds may not return to the island each season. I 
1 *« r VL5r 
Plue-faccd Eooby 
Four birds o* this species were seen during the day. Three were lone 
adults, and one was a subadult in a mixed feeding flock. Ixdept for one sij.htin£ 
of an adult headed northwest, none of the birds were flying in any determinable 
♦ 
direction. 
Two Flue-faced were also noted during the nocturnal observations. 
