An opportunistic sighting of a flock of black petrels (Procellaria parkinsoni) at Galápagos Islands, Ecuador Notornis, 63 (1), 54-56 C.P. Gaskin; P. Harrison; K.A. Baird; F. Cunninghame; S.M.H. Ismar; E.A. Bell (2016)Article Type: Short noteAttachmentDownload