Male specimen of Guadelope Petrel or Guadelope Storm-Petrel (Oceanodroma macrodactyla) in the Field Museum, Chicago, Illinois, USA. Photographed on 22 December 2010.This species is extinct - last seen in 1906.www.inaturalist.org/observations/55752554
The birds of Norfolk & Lord Howe Islands and the Australasian South Polar quadrant :London :H.F. & G. Witherby,1928.biodiversitylibrary.org/page/58795369