Gould, P. J. 1963 Bonin Island Petrel 1 August 5--ca. 100 mi. SW Johnston Island, Pacific Ocean These birds have become more and more common the farther we get from Hawaii. The gray back is quite visable. They are very rapid flyers, moving much faster than nay Shearwater I have seen. Although they generally do more flapping than do Shearwaters, they occasionally do a lot of gliding. Even when gliding they are much faster than shearwaters. Their wing beats are also much more rapid. In flight the ventral surface of the wing has a dark hashmark extending diagonally into the middle center of the wing. This species is easily told at a distance from the Wedge-tailed Shearwater by the extremely bright white underparts, more rapid flight and smaller size. Another good mark appears to be a dark patch extending from the nape down the side of the neck like a 3/4 collar. 1964 January 4--Pacific Ocean 2nd day out Oahu, Hawaiian I. Two individuals were seen today. January 11--Pacific Ocean 9th day out Oahu, Grid Area One bird today in flock with boobies, and other Pterodroma of 1540. January 12--Pacific Ocean, 10th day out Oahu, Grid Area 1 bird today at 1030 flying NW. 6 Pterodroma were seen but not identified today. Some were probably this species. February 15--Pacific Ocean, Grid Area SW Johnston Island One bird flyng SE at 1552. March 3--Pacific Ocean, 2nd day out Oahu 1 bird at 0853 flew back and forth in front of ship several times then headed NNW.