The tree kingfishers or wood kingfishers, family Halcyonidae, are the most numerous of the three families of birds in the kingfisher group, with between 56 and 61 species in around 12 genera, including several species of kookaburras. The family appears to have arisen in Indochina and the Maritime Southeast Asia and then spread to many areas around the world.
详细百科解释