Gray-backed Tern
- kingdom: Animalia
- phylum: Chordata
- class: Aves
- order: Charadriiformes
- family: Laridae
- genus: Onychoprion
- species: Onychoprion lunatus
Leone- Mapusagafou
- Vailoatai
Western District
American Samoa
Banana Village- London Village
- Tabwakea Village
Line Islands
Kiribati
Enewetak
Enewetak Atoll
Marshall Islands
Nouméa
South Province
New Caledonia
Koror State- Koror Town
Koror
Palau
Apia
Tuamasaga
Samoa
Nuku‘alofa
Tongatapu
Tonga- United States
Uturoa
Kaneohe Station