One day while we were doing routine maintenance on the Bonin boxes we opened one up and a pair were inside. Very early prospectors! I unslung my camera to get a few photographs before leaving them be. Like many prospecting petrels they will hang out in their sites for several months before breeding. Tern Island, Northwestern Hawaiian Islands. USFWS PD
The birds of Norfolk & Lord Howe Islands and the Australasian South Polar quadrant :London :H.F. & G. Witherby,1928.biodiversitylibrary.org/page/58795344