The largest pigeon in the region, with dark purplish plumage except for metallic green around the neck. Generally uncommon endemic of offshore Japanese and to a lesser extent Chinese and Korean islands. Occurs in mature broadleaf forests, where it forages on the ground or in canopy. Also favors pines, especially in the Ryukyu Islands. Rustles about loudly when feeding. Deep call and slow moaning song may recall the everyday Rock Pigeon.