Gray-backed Tern Oahu Nature Tours' Photo Gallery Click on any thumbnail to view a larger version of the selected image.   gray-backed tern 01  gray-backed tern 02  gray-backed tern 03        Hawaii Birding Tours    Reservations    Oahu Nature Tours    Phone:   808  924-2473 natureguide@oahunaturetours.com ©  Content and photos on this website can only be used with written permission from Oahu Nature Tours, Inc. Our photos are for sale as printed images and available for one time use for publications and other media.