There are 3 Kingfisher subfamilies of the family Alcedinidae
Alcedininae - Old World - River kingfishers or Pygmy kingfishers Halcyoninae - Old World - Tree kingfishers or Wood kingfishers Cerylinae - All the New World Kingfishers or Water kingfishers See Card - Alcedinidae - Kingfishers+ for further information