-4- 
during October 1965 and have irregularly increased since# Greatest num¬ 
bers to date were encountered during the present cruise. The grid un¬ 
questionably seems a part of the species* wintering grounds. 
Red-tailed Tropicbird (4+1 nocturnal)• 
This species has been recorded in low numbers during all previous 
cruises. Two specimens were collected. 
White-tailed Tropicbird (5+2 nocturnal) 
Equally low nunrbers were recorded during early February 1966# Great¬ 
er numbers were present during the fall 1965 surveys. 
Blue-faced Booby (81 + 8 nocturnal). 
Numbers of this species were comparatively high during the present 
dTiiJGf r due iritis' iis .nors Likely the result of increased diurnal cruise 
activity in the vicinity of the islands rather than an increase in birds. 
Four banded birds were collected during the present cruise; 3 from the 
Phoenix Islands (Birnie, Enderbury and Phoenix)» and one from Jarvis in 
the Line Islands (see Table 5). A total of six specimens was collected# 
Brown Booby (3). 
The three sightings were in the vicinity of Howland Island. This 
species apparently does not wander extensively like the Blue-faced 
Booby and most birds utilizing the grid are likely based on Howland Island. 
Red-footed Booby (13 + 4 nocturnal). 
Approximately the same numbers were .recorded as during the early 
February cruise. Most sightings were on 27 February near the central 
islands. Although some interisland movement between Howland-Baker and 
the Phoenix group occurs, the majority of the birds found in the grid 
are likely based on Howland Island. 
