The Nicobar pigeon (Caloenas nicobarica) is a striking bird known for its iridescent plumage, predominantly green and copper, with a distinct white tail. It inhabits small islands and coastal regions in Southeast Asia and the Pacific, forming large flocks. Noteworthy for its nomadic behavior, it plays a vital role in seed dispersal across its habitat.

The Nicobar pigeon (Caloenas nicobarica) is natively found in the islands of Southeast Asia and Oceania. Its geographical distribution includes the Nicobar Islands (India), the Andaman Islands, the Malay Archipelago, the Philippines, Solomon Islands, and parts of Papua New Guinea.

The Nicobar pigeon typically inhabits dense forested areas of small islands and coastal regions. It prefers lowland rainforests, mangrove swamps, and secondary growth forests near the coast. The climate in these regions is generally tropical, characterized by high humidity, consistent rainfall, and warm temperatures year-round.

Caloenas nicobarica primarily feeds on seeds, fruits, and buds, playing a role in seed dispersal in its ecosystem. Its preference for islands with dense vegetation allows it to exploit resources that are less accessible to predators and other competing species. The pigeon is a ground feeder, often seen foraging on the forest floor or in understory vegetation.