The Nicobar pigeon (Caloenas nicobarica) is a large beautiful bird found mainly in South East Asia and Oceania. It is the only living member of the genus Caloenas alongside the extinct Spotted green pigeon and is the closest living relative of the extinct dodo and Rodrigues solitaire.

Nicobar pigeons have developed a bright plumage; their head is grey, like the upper neck plumage, which turns into green and copper hackles. The tail is very short and pure white. The rest of their plumage is metallic green. The cere of the dark bill forms a small blackish knob; the strong legs and feet are dull red. Females are slightly smaller than males; they have a smaller bill knob, shorter hackles, and browner underparts. Immature birds have a black tail and lack almost all iridescence.