The Nicobar Pigeon is a species of tropical bird found in the Nicobar Islands of India. It is a large, dark-colored pigeon with a distinctive white patch on its neck and a glossy greenish-purple sheen on its wings and tail. It is the
From Wikipedia
The Nicobar pigeon or Nicobar dove is a bird found on small islands and in coastal regions from the Andaman and Nicobar Islands, India, east through the Indonesian Archipelago, to the Solomons and Palau. It is the only living member of the genus Caloenas alongside the extinct spotted green pigeon and Kanaka pigeon, and is the closest living relative of the extinct dodo and Rodrigues solitaire.