(KBC-7/5/67) 
^?kcA S' Xt ' K § J f' 
Table 
20th Century Observations of Red-footed Boobies on Wihoa Island, 
Dat e of Survey 
Size of 
Population 
Reproductive Sbatus 
Winter Observations 
£ Dec. 21-22,1953 
(k) Dec. 9-16,1961 
200-300 
(Richardson, pers * comm . ) 
"All young were nearly full grown and capable of 
flying" (Kramer, 1961 ) 
Spring Observations 
Mar. 18, 1915 
Mar. 18, 1954 
Mar. 6-7? 1964- 
lf) Mar. 13-14,1965 
g) Mar. 8 - 9 , 1967 
c. 800 
30-40 
2,600 
d. 3,5oo 
c. 3,000 
Eggs present/ 
(Munter, 191' 
(Richardson, pers . comm . ) 
c. 1,000 nests with eggs, none with young (P0BSP) 
c. 1,700 nests with eggs, none with youngs (POBSP) 
Only about 5^ of nests with eggs, none with young/ 
_ s (POBSP), 
Summer Observations 
«P June 11-16,1923 c.6, 000 
) June 10 , 1962 
July 28- 
Aug. 1, 1966 
f(y Aug. 7-15? 1940 
^jo) Sept. 24-25?1964 
From recently completed nests through fresh and 
incubated eggs to recently-hatched through half- 
grown young/ (Wetmore, 1923) 
Young in various growth stages. Wo eggs observed,/ 
(Kramer &. Beardsley, 1962 ) 
Cl, \ f-J 00 vw^2 
-Be st- 6 ; c. 3 - 7 °Jo with incubated eggs, the 
rest with young. Of the nests >with young about 
10 56 were recently hatched, 40 °/o were about 2-3 
weeks old, and 50 were more than 3 weeks old^ 
"Breeding seemed to be in all stages 
(Vanderbilt & de Schauensee, 1941 )io)* 
Autumn Observations 
c. 900 
15 large nestlings and 68 immatures counted 
Wo nests with eggs or small young observed,/ (POBSP) 
^^1967 13“l4 September 
rg'JiyoQ 7“9 March 
very abundant Eggs to 
y 1967 ). 
near fledging young (Kridler, 
c. 3,000 
Eggs to small downy young but )most nests* with 
contents with eggs, 
count of -115 nests: 60 ( 
54 ( ; °/o) with eggs; 1 ( 
\ uV 
J 
downv young 1 
VlVvA 
l 
C 
Sample 
Jo) empty but active; 
°fo) with a small 
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y 1 QV* V\(! 
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