BO EEL PETREL ----- Annotated List ---- LISTALSKI 
LSff 1 Feb. 14, 1 63 (ECS Kept) Estimated population --—-— Abundant, nesting 
Mar. 12-13, ! 63 Bloods samples ------— none 
Collected — ----------- 1 
Banded -, — -■ --- none 
(ECS notes) Bonin Petrel burrows everywhere in the grass. After leaving 
Lisianski lat§ in the day (5j00) the sea was covered with flying birds for 
8-10 miles away from the island. (WOW notes-Eeb,l4) Petrel burrows appear 
to be more nume3 d us than on Laysan. 
LS/f 3 Mar. 11-12, *64 (ABA. Rept) Estimated population -----» 100,000 + 
Lurnbeb of nests ----—■— numerous 
Lumber of young ----- ?// 
Lumber banded -----------—---- 300 
L£$ 4 Aug. 21-23, ! 64 (Rept) Estimated population ---- 15,000 adults 
Lumber banded ------ 200 
This was the only species not also found at Pearl and Hermes Reef, although it 
may have b§en present at Seal and Grass Islands, judging from a small numbers 
of small burrows seen. Learly the entire population seemed to arrive between 
1830 and 1930 (sunset was close to 1900). Observations of the incoming birds 
at that time indicated that they were much more numerous than the Wedgetails 
though they seemed to occur in about equal numbers on the island. A few birds 
were found under1 Eragrostis, and Ipomea during the day. Lo evidence of courtship 
was seen, all the birds were, sitting alone, though a good deal of calling took 
place throughout the night. (PWW notes -Aug.21) At dusk saw 200-300 flying 
over the island. 
L Sff 5 Sept. 1.8, f 64 (ERE) 30 seen flying into island at dusk. Lo nocuturnal 
sruvey hence data incomplete 
LQ^ 7 Mar. 12-14, ? 65 (WOW Rept) Estimated population *---- 1,000,000 
Reproductive status^ ----eggs & small chic] 
Berlese samples -*—■—* none 
Blood samples ---——• 20 
Banded -—— -——•—- 3,000 
Returns -—-------- 3 
Returned to island at dusk in great clouds. Probably one million birds using 
the island. Eggs and small chicks were found. Eggs were frequently found / 
above ground. (RBC summ) Extremely abundant., Present probably in the hundred^ 
of thousands, some of the expedition members even venturing guesses that a 
million birds were present. Several eggs seen and a few young. Hoeman opened 
one egg which had an embryo almost ready to hatih. Towards eveing s the petrels 
appeared in swarms over the island and scattered individuals could even be seen 
at mid-day. The ships crew repbrted that hundreds of these birds flew abord 
the Shearwater the night of the 13th. One estimate placed the number as high 
as 500. (WOW'notes ) There* are many dead Bonins lying around in the interior 
and upon closer examination I find that they are almost invariably caught by 
a wing in the vegetation, and I suppose, starve to death. 
