Terns (Sternidae)

Black-naped Tern (Sterna sumatrana) - HBW 3, p. 651

French: Sterne diamant German: Schwarznacken-Seeschwalbe Spanish: Charrán de Sumatra

Taxonomy: Sterna Sumatrana Raffles, 1822, Sumatra.
Thought to be closely related to S. dougallii, with which sometimes nests, but chick pattern very different. Sometimes considered monotypic, but divided into races on basis of shape. Two subspecies recognized.

Subspecies and Distribution:

  • sumatrana Raffles, 1822 - Andaman and Nicobar Is E to S Japan and China, and S through Malaysia, Philippines, Indonesia and New Guinea to NE & E Australia and Pacific islands (Yap, Marshall Is, Ponapé, Micronesia), with breeding also suspected (at least formerly) in Bengal, Bangladesh and S Myanmar; birds from Japan and China winter to S.
  • mathewsi Stresemann, 1914 - Aldabra, Amirante, Chagos and Maldive Is, W Indian Ocean.