) 
57 
high water mark. M Eggs or young birds in various stages of development 
were found in the nests." Three or four young nearly ready to fly were 
noted. "One nest contained three eggs - an oddity, no doubt." "These 
birds seem to lose one of their offspring, as invariably we have seen but 
one young bird, or a freshly hatched bird and one egg, in the same nest." 
In May 1923 Wetmore (unpub. notes, 1923) found about 100 pairs nesting 
# 
on the island, mainly near the one plot of grass at the northern end of the 
island. Immatures were present, as Well as nestlings of several age groups. 
In March 196l the species was found nesting at the edge of the vegetation 
above the beach all around the island (Woodside and Kramer, op . cit. )* An 
estimated. 400 birds were present in Marsh 195^ (Richardson, pers. comm. ). 
■> * 
Population : The resident population of Lisianski seems to be between 300 
and 500 adults. In March 1963 the population was placed at 500 adults, with 
nestlings and eggs. The following year the estimate was 575 adults, With 
nestlings and eggs. In August 1961* the estimate was again 500 adults with 
100 immatures and a few nestlings and eggs. The population was scattered 
along the beach, but two large clubs, mainly of adults, were found in 
clearings just off the beach, one at the north, and one at the south end of 
the Island. Many of the immatures were still being fed by adult birds. 
However, in September 1 96 k the population was placed at 250 adults and 
Immatures. Adults outnumbered immatures about two to one. In March 1965 
the Survey estimated that 875 adults were present at night, and breeding 
pairs had nestlings and eggs. The following July there were an estimated 
300 adults and 100 nestlings on the island. 
Reoroduction: The species was nesting with eggs in early stages of in- 
- - - —- - m —^-i— 
S 
K 
cubation in March 1828 (isenbeck in Kittlitz, op . cit .). Large nestlings 
P. !. 
