The ruddy kingfisher (Halcyon coromanda) is a medium-sized tree kingfisher which is widely distributed in east and southeast Asia, ranging from South Korea and Japan in the north, south through the Philippines to the Sunda Islands, and west to China and India. It is migratory, with birds in the northern part of the range migrating as far south as Borneo during winter. Locally common in southern parts of its range, the ruddy kingfisher is rare in Japan, where it is highly sought after by birders. Ruddy kingfishers inhabit forested areas from the temperate to tropical zones, often in thick jungles and rainforests.