King, Warren B. 1964 Haleakala Crater, Maui 12 May 1964 David Bratley, Larry Huber and I left Honolulu 1520 on HAL for Kaluilui, Maui, arriving 15-15. Rented car and drove to Haleakala Crater after picking up film and .22 shorts for Larry's pistol. Arrangements for permits had been made previously over the phone from Honolulu. Picked up permits at Park Headquarters at 530 and departed Halermoruc Trail for Holua cabin. 3.9 miles, at 1755. Chukar, Ring-necks and Skylarks numerous. On way to Park stopped at Kaualua Pond. Saw 25+ Shovelers, 25+ Stilt and 5+ Coot. Nothing unusual seen, although observations were incomplete. Arrived at Holua Cabin 1915 at dusk. Heard Dark-rumped Petrels upon arrival. Donned lights and searched over cliffs behind cabin until 2200. Saw one cat but Larry had the pistol. The birds sounded high up, crater river or higher. No evidence of birds landing anywhere. Calling diminished by 2200. Larry found an unoccupied burrow, and had looks at several birds in the air from vantage point high on cliff. Dave and I had to be content with hearing their peculiar barks and squeals. At times they sounded a bit like large deeper voiced, Bonin Island Petrels. Birds seemed to have individual calls althought standard call predominated. Birds only calling from the air. Had snack supper and retired 2315. Population of valley Bratley and I covered not more than six. Larry suggested not more than 20 for Canyon as whole. After leisurely breakfast left Holua cabin at 0900 to search same area we had been over night before, Larry taking one slope, Dave and I taking