2 
Bulwer’s Petrel ( Bulweria bulwerla ) 
This species has reappeared in the area after an absence of 
three months* “’even individuals were recorded, of which 57 percent 
were within the grid. 
No specimens were collected. 
Harcourt's Storm Petrel ( Oceanodroma castro ) 
This species has maintained a fatrly constant population level 
within the grid for the last three months. Outside the grid, however, 
there has been a slight reduction in numbers. J 'en individuals were 
* » 
recorded this month, 50 percent of which we re inside the grid. 
No specimens were collected. 
Sooty Storm Petrel ( Oceanodroma mar k ham i ) 
One individual was recorded within the grid on 9 March. 
No specimens were collected. 
Red-tailed Tropicbird ( Phaethon rubricauda) 
Of the 17 birds recorded, 64 percent were within the grid area. 
This higher population within the grid was also true for January and 
February. Judging from the fact that the total number of birds this 
month falls in between the 23 in January and the 14 in February, it 
appears that this species maintains a fairly constant population level 
during these three months* 
Two specimens were collected* 
White-tailed Tropicbird ( Phaethon lepturus ) 
Only three individuals were recorded this month, all outside the 
grid# One bird was observed near the Johnston- Sand Atoll# ^his species 
apparently maintains a fairly constant, although small, population in 
