Greater Crested Tern

Thalasseus bergii

Southern Africa

Thalasseus bergii bergii

First Seen: Blue Lagoon, Umgeni River Mouth, Durban, Kwa-zulu Natal, 05/12/1991

Indonesia

Thalasseus bergii cristatus

First Seen: Senur Harbour, Denpasar, Bali, Indonesia, 18/08/2023