very nigh figure is actually the most accurate. 
In August 1964 the population was estimated at 15,000 hut the following 
» , ' 
month only three birds were seen. During July 1965 an estimated 200 birds 
were reported. 
Reproduction : The species has nesting burrows throughout the vegetated 
portion of the island. Burrow density is greatest in the large bunchgrass 
areas, and lowest under the rim of Scaevola at the perimeter of the island. 
In March 1965 eggs and small nestlings were found over much of the island. 
Eggs were frequently found above ground in the bunchgrass and morning-glory 
habitat. In August 1964 adults returned to the Island in greatest numbers 
j 
in the half hour before and after sunset. Courtship behavior was not 
observed; all birds seen were sitting alone, though a good deal of calling 
was heard all night. In July 1965 only a few adults Were observed, usually 
sitting at burrow entrances. 
Egg-laying occurs primarily in January on Eure Atoll, 300 miles north- 
west, and nestlings have been found in March, April and July at Pearl and 
Hermes Reef, 150 miles northwest. 
Other Specimens : AMNH 528329, ?, 3 July I89I; USHM 300662, ?, 17 May 1923; 
USHM 300663, cf, 17 May 1923; USHM 300664, 9, 17 May 1923; USHM 300665, c f, 
17 May I923. 
POBSP Specimens : USHM 494125, cf, te. 4x4 mm., 4x3 mm., 152.1 gms., 
13 March 1965; USHM 494126, 9, ovary 10 X 6 mm., largest ovum 1.5 mm., 165.6 
gms., 13 March 1965; USHM 497951, cT, 14 February 1963, skeleton. 
Bulwer f S Petrel (Bulweria bulwerii) 
1 
' f 
Current Status : Rare visitor, breeding? 
Prior Records : Munro (1941) found adults incubating eggs on Lisianski In 
late June I89I. Most nests were under bunchgrass clumps. Large numbers 
