BOWIH PETREL 
Annotated List -- p.2. - 
LISIfflSKI 
LS^' 7 Mar* 19-55 (cont) (DLS-Mar.13) 1 found a Bonin Petrel with its head sticking 
out and the rest buried . I have seen over 1, 000 birds dead on the ground., 
they are tangled in the Ipomea and could not get loose (DLS summ) There are 
a bl&e~jillion of them on the island according to Wirtz. We banded 3000 
birds in less than an acre and there were still unbanded birds there. 
There “were eggs on top, of the ground which had been broken. I found 
broken eggs with chicks almost fully debeloped. 
They make the island very unpleasant to walk on. I heard birds running 
into each other in the air while I was bailing at night 
LQ^ 9 July 14-17, f 65 (BSC Kept) Population estimate *----200 
A few individuals were seen on Lisianski, usually sitting at the entrance 
of Wedge-tail burfeos. There was no evidence of nesting at this time. 
LSft 13 June 16-19, *66 (PCS kept) Population estimate ----- 500 adults 
500 young 
Banded and blood samples ---- none 
Collected ------ 1 
Only a few immatures remained on the island. One was seen attended by both 
adults. AL1 were fully feathered and ready to fly. The total population 
of adults and immatures was estimated to be 1000. Adults handled by Crossin 
threw up large quantities of oil and partly digested food. (BSC - no 
immatures were noted. The species is apparently further along than those on 
Laysan and the vast majority of birds have already left the island. On the 
last night a few immatures were noted on the west shore at the Scaevola 
ridge. Probably under.*1000 birds on the island. 
L Sft 17 Oct. 18-20, *66 (KB Bept) Estimated population -- 500,000 + 50^ 
Banded, recaptured, collected -- none 
Belatively few of these birds were seen during the daylight hours on th^ island, 
but around dusk they came into the island in tremendous numbers, until, without 
a doubt, they were the most numerous avian species on the island. The 
population was estimated very roughly by figuring that there were about five 
Bonin Petrels per 100 square feet in the same area as the Wedge-tailed Shearwater. 
Much courtship and mutual preening was observed. Many of the burrows on 
the island were of this species, and many birds were actively digging new 
burrows. In the few burrows that were chekced there were no eggs or young. 
Banding and recapture of Bonin Petries was not emphasized due to limited 
time available for activities on the island. 
L5^ 18 Mar, 20, *67 (CDH Bept) Estimated population --- Hundreds. 
Ho birds were observed , on Lisianski during, the daylight visit but hundreds were 
observed off the reef, moving toward the island at dusk as the field party 
departed. 
