Jaeger species (2) 
Skua (1) 
The two jaegers (probably Long-tailed) and Skua were recorded on 6 
April E-NE Howland ^sland* All were encountered in mixed feeding flocks* 
Sooty Tern (3290 + 648 nocturnal) 
This was the dominant species on practically every day during the grid 
period (more white-rumped storm petrels were recorded on 8 April)* Sooty 
Terns accounted for over 97 7* of total birds recorded in the grid (both 
diurnal and nocturnal). Numbers were greatest on the two peak days (7 and 9 
April)* Greater numbers can probably be expected in the grid with buildup 
of the current breeding colony on Howland Island* The large concentrations 
of feeding birds in close proximity to Baker Island on 9 April was unexpected 
since this area has not previously shown such high densities of terns* A 
total of 90 specimens was collected (86 diurnal, 4 nocturnal). Only one of 
these was banded (Howland)* 
Gray-backed Tern (1 * 11 nocturnal) 
Common Noddy (5 + 1 nocturnal) 
White-capped (Hawaiian) Noddy (4+1 nocturnal) 
Blue-gray Noddy (2) 
WhiteCFairy) Tern (10) 
All 5 species have been recorded in the grid in low numbers during all 
previous cruises* Specimens of all but the Blue-gray Noddy have been collec¬ 
ted within the grid* Most of the Gray-backed Terns recorded during nocturnal 
observations during the present cruise were detected by call notes* Low num¬ 
bers of all 5 species can be expected in the grid at all times* 
