King, Warren B. 
19& 
Haleakala Crater, Maui 
me next to it, the two being separated by two gulches and a ridge. Climbed 
maybe 500 feet up, probably to above 7000 feet, where Larry discovered four 
burrows at the bottom of a shear cliff face, one of which he dug into and 
discovered a Dark-ruraped Petrel incubating an egg. We headed for cabin in 
glee, where the egg was blown. The embryo was formed but small} the egg 
was probably five to seven days old. The white was very viscous. Egg 
was white, larger than hen’s egg, and more elliptical. Bird photographed 
after tying a stj&iig to its leg so it couldn’t fly away. Bird then skinned 
by Larry, cf, teBtes 8 mm. Larry left cabin at 3 for banding siege 
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on the cliffs, while Dave and I planned a population check along the ridge 
south of the cabin. Dave and I hiked 2 miles or so along the crater floor, 
then swung up onto a shoulder, climbing 1000 feet at least to about 9000 
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feet where we found three burrows at the base of a cliff and one lower on 
ft 
the shoulder. One of the three burrows contained a bird during the day, 
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probably incubating, and the other two burrows looked new. Larry found one 
bird which he banded, as well as tsn or fifteen more unoccupied burrows. 
®Le. birds are probably Just beginning to lay since most of the burrows are 
<y but show signs of recent use* The burrows are 8 inches in diameter, 
oval in shape and from 4 to 7 feet deep, depending upon the amount of 
available soil. Burrows run roughly harisontal until last 2 feet which drop 
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steeply to chamber at end. On our return trip to the cabin Dave and I heart 
birds all along the ridge, increasing as we approached the cabin. Since 
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the birds should be settling down by the time we got back to the cabin it 
indicates that the greatest population density is near Holua cabin. 
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