Bonin Island Petrel ccn l t. 
corner of the grid area. His species completed its cost orecdjn- 
molt dinging July,, as evidenced by the preponderance of birds seen in July 
with immaculate new plumage. 
rrft » 
i 1 . 
— 
Dark-r iruped Pe trel 
This species increased 227 b in number from 186 in June to 6Of in 
July, by the end of the nenth most birds seen had finished vciting, 
species eras distributed throughout the grid area except for the northwest 
corner. Several feeding flocks composed exclusively of this species were 
noted. Two birds were observed catching flying fish, live of this specie 
were collected* all of which were molting. One* collected in the 
had a fresh squid in its craw. Three of the birds were losing brood patch 
feathers and the reproductive organs of these birds were beginning tc en¬ 
large* indicating that they are possibly just preparing to breed. This 
suggests an August breeding season for the birds of this species appearing 
in the grid area. Study of the collected specimens should reveal the 
land base of these birds. 
a f ter noon* 
'elite-necked Petrel 
Thirty-eight of this species was seen in July* one more than in Juno. 
This species was seen as far 
north ox 22°I 
I* an 
pany of Dark-rumped Petrels. 
One of this 
s oec 
A. 
molting heavily. 
vp S 
r i "i /- <-» n /-> 
Vf T.-n 5 
'Juiwer ! s Petrel 
Fifty-eight of this species were seen in July* a Icf increase over 
the fO seen in June. Almost ail of these T 'ere observed close to the 
1 
