(kbc-7/6/67) 
Table 
20th Century Observations of Sooty Terns on Wihoa Island. 
Date of Survey 
&Vec. 21-22,1953 
0 Dec. 9-16,1961 
£ Mar. 18, 1915 
Y Mar. 18, 1954 
^)Mar. 6-7, 1964 
(n)'W 3 X. 13-14,1965 
(/l Mar. «-9, 1967 
v 
y 
July 28- 
Aug. 1, 1966 
3) Aug. 7-15,194-0 
73 f 
Sept. 2b“2'5 ? 1964- 
Size of 
Population 
Reproductive Status 
Winter Observations 
(Richardson,pers.comm. ). 
fseen soaring over cliffaj (Kramer, 196l)« 
Spring, Observations 
(Munter, 1915 
6-8 ?4#f (Richardson, pers . comm . ) 
10, 000~15 ? 000 C. 6,000 nests -with eggs, c. 100 week-old chicks 
founds (POBSP)v 
c. 100, 000 C. 90°/o with eggs, 10$ with young, (POBSP), 
c. 25^000 On eggs, no young found^ (P0BSP)« 
Summer Observations 
June 11-16,1923 c. 12, 000 
June 10, 1962 
c. 500 
Majority of nests with fresh eggs but fledged young 
present in some parts of colony^ (Wetmore, 1923)* 
With eggs and fledged young (Kramer & Beardsley, 1962)» 
Wot breeding. Two groups of birds observed, on ground/ 
(P0BSP) # 
Two colonies, one large, one small, present. n Westing 
was in all stages from unhatched eggs to full 
fledged young. Ir (Vanderbilt & de Schauensee, 1941 ). 
Autumn Observations 
1 
{Heard flying overhead^ *Wot breeding/ 
(P0BSP), 
±9&7 
is, 
19^8 
25 July 
13-14- September 
very common Downy chicks to fledged young (Kridler, 1964- ). 
7-9 March 
c. 20,000 
Only a few adults and flying young noted (Kridler, 1967). 
2 , qvo - trao 
C. ^ • ■00 8 = 6,~000 birds with fresh to slightly incubated 
eggs. Two small colonies with large young also present. 
One contained several hundred young from half-grown 
(c.4- weeks<)ld) to near fledging young (c. $-7 weeks old). 
The other kelh gfcfca contained about 50 young about 4-5 
weeks old. A number of flying immatures were also 
seen. A majority of the birds present were not 
yet nesting (P0BSP). 
