Our Pelagic Homepage
Species List
Information about Hawai'i's seabird species
Information about Hawai'i's marine mammal species

Index of our trip reports
Sightings Charts


Gray-backed Tern
Sterna lunata
*Breeds on Oahu

Similar to Sooty Terns, except back, wings, and tail feathers gray. Head and eye-stripe are black. White forehead extends further back behind the eye than the sooty tern. Bill and legs black. Characteristic posture somewhat crouched and bent over when standing, with wings and tail pointing upward. Length:14-15 in; wing span: 29-30 in.

A plunge diver, the Gray-backed Tern does not depend on predatory fish to drive prey to surface. Diet consists of sea striders, crustaceans, juvenile flying fish, cowfish, and goat fish.

A small breeding colony of 25-50 pairs of this species exists at Moku Manu island.



Trip Reports By Date        Sightings Charts


Checklist | Pick-up locations | Links
Guestbook | Birding on Oahu
Our Land Eco-Tours | Bird Books



Oahu Nature Tours
Phone:(808) 924-2473   Fax: (808) 924-5395


All content and photos on this website are copyrighted
and not to be used or distributed without written permission
from Oahu Nature Tours, Inc. and Robin W.Baird