"houses" were constructed of three or four thin slabs of beach rock propped 
up to form a small shaded nest area with one or two entrances. Several such 
"houses”, built by POBSP personnel in 1963, were occupied in 1965. A 
OC*COLSp*-/ 
total of 20 to 25 pairs the "houses". 
Banding : POBSP personnel have banded 570 adults and 240 nestlings. None 
of these had been recovered on other islands through August 1965. 
Of 246 adults, banded in July 1963? approximately 25 percent were 
recaptured in July 1964. An additional 278 adults were banded in July, 1964 
and with the returns a total of 34l birds was captured. If the Lincoln 
index is applicable then we would conclude that approximately 20 percent 
of the total population was banded in July 1963 and that 1250 birds visit 
the island in a period of one year. Since an estimated 870 breeding birds 
were present in July, 1963 and since an unknown number of birds did not 
breed or may not have been successful in nesting, we heliroe this number is 
€ 
a good approximation of the tru population. 
None of the 9 k nestlings banded in July 1963 Nad returned to the island 
by May 1965? which probably indicates that young birds have a long pelagic 
period before their first breeding season. 
POB^ 
POBSP Specimens : USNM 495676, 9, ovary 15x13 mm., 680 gms.. May 30, 1965; 
USNM 495677, ovary 15x12 mm., l.orum 5 mm., 721 gms.. May 30, 1965; 
USNM 495678, ?, ovary 20x12 mm., 1. ovum 5 mm., 667 gms.. May 30, 1965; 
USNM 495679, 9, 1. ovum 7 mm., 780 gms.. May 30, 1965,* USNM 495680, 9, 
ovary 16x12 mm., 1. ovum 5 mm., 642 gms.. May 31, 1965,* 
■ ' 
USNM - uncatalogued skeletons: cf, testes 10x12 mm., 715.5 gms., .May 31, 
1965,* cf, testes 12x15 mm., 620.5 gms.. May 31, 1965; cf, testes 10x5 mm., 
727.5 gms.. May 31, 1965; cf, testes 12x6 mm., 820 gms.. May 31, 1965; 
9, ovary 20x10 mm., 1. ovum 5 mm., 642 gms., May 31, I965; 
USNM - uncatalogued. alcoholics: 772 gms., May 30, 1965; 748 gms.. May 30, 
1965; 647 gms.. May 30, 1965; 793 gms., May 31, 1965; 672 gms.. May 31, 1965 
Other Specimens: USNM 1894-17, cf, May 13, 1939* 
