were moving rapidly in a northerly direction. A few were seen 
sitting on the water, usually in the company of a few storm petrels. 
* * 
Leach's Storm Petrel ( Oceanodroma leucorhoa ) 114 + 2 nocturnal 
Storm Petrel sp. (unidentified*) 12 +2 nocturnal 
Probably all of the storm petrels seen on this survey were 
reach’s, but as similar types could easily be overlooked, they were 
recorded pn the daily log sheets only as white-rumped storm petrels. 
The density distribution has changed since last cruise, but this 
behavior has been noted without explanation since January. The 
oeneral trend of increase in the north section would seem to be 
indicative of a migratory movement, but no other data were collected 
which substantiates this. Direction of travel did not follow any 
» ■ 
obvious pattern, and the variation of local densities would not seem 
likely if a loose migration was under way. 
Red-tailed Tropicbird ( Phae thon rubricauda ) 2 
Both sightings were in the north section; neither bird was 
attracted to the ship, and in fact both seemed to avoid it. 
Glaucous-winged Gull ( Larus qlaucescens ) 0 
This is the first grid survey to date on which no Glaucous- 
wings were seen. The pattern of decline has closely followed that 
of the Herring Gull, 
Herring Gull ( Larus arqentatus ) 4 
All sightings were of adults in the north section. The 
continuing decline of the grid population suggests that breeders 
are returning to the nesting islands. 
