52 
PuBSP Specimens : USEM 4-92959, ?, ovary 12 mm., 12 March 1963; USEM 4-95631, 
9, ovary 9^5 mm., largest ovum 1.5 mm., 16 July 1965; USEM 4-95632, $, 
ovary 10 x 4 mm., largest ovum 1.5 mm., 16 July 1965 . 
Christmas Island Shearwater (puffinus nativitatis ) 
Current Status : Breeds annually. 
■ • ' ' -W • , i 
Prior Records: The species was not found on Lisianski *by Isenbeck in 1828 
(Kittlitz, oj>. cit . ) but was recorded by Palmer and Munro in June I 89 I 
/ «■ _j * 7 N Trfi r% rt J_ *i ^ _* - _ *! * — , T — . n — jJt X 
Lisianski in March 1915* About 10,000 birds were scattered over the island, 
usually in association with Wedge-tailed Shearwaters. Eo eggs Were found. 
Wetmore (unpub. v notes, 1923) estimated about 300 pairs to be present in 
May 1923. Eggs were found. 
Population : Except for March 1964-, the species has been noted on each P0BSP 
visit. Only a small number of adults were found in March 19 63 , *but an 
estimated 750 were present in March 1965 . The population was placed at 4-00 
in July 1965 . A nestling was found in August, and three adults in September, 
Reproduct ion : Eearly hatched eggs were found in late June 1891 (Munro, op . 
cit.). Mhnter (oj>. cit.) did not find any eggs on Lisianski in March 1915. 
Eggs were found in May 1923 (Wetmore, unpub. notes, 1923)- A large downy 
nestling was found under Scaevola at the north side of the island in August 
1964. Though several pairs were handled in March 1965, no eggs Were found, 
and the birds handled did not have brood patches. 
Eggs have been found in late April and May, downy nestlings in June 
and July, and immatures in September and October, on Kure Atoll, 300 miles 
0 
to the northwest* But the number of observations on this atoll are also 
r 
