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4 
December 1964 - BCF cruise 
Herald 1 s Petrel 
Six birds presumably of this species vere observed, including tvo 
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dark phase birds, the first to have been seen in the area. They vere 
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distributed throughout the central part of the area. 
Mottled Petrel 
Tvo birds, seen only imperfectly, vere thought to be this species 
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One vas flying south and the second vas taking part in a feeding flock 
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Phoenix Petrel 
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One bird presumably of this species vas seen on 7 December near 
Hawaii. 
Bonin Island Petrel .. — - ' 
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Three imperfectly observed birds seen in December vere thought to 
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be this species. Tvo vere north of Oahu and the third vas east of Hawaii. 
Cook's Petrel " r k 
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Numbers of this species decreased sharply’from 268 in November 
to 19 in December. A slight concentration vas noticed in the southern 
end of the area, but individuals vere observed in all parts. This species 
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is most likely heading south for its breeding season and will probably 
not become abundant again until early summer. 
Dark-rumped Petrel 
One bird thought to be this species vas seen on l4 December 
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toward the southeastern comes of the area, further south than any have 
previously been reported. 
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