This is a very large kingfisher, measuring 35 to 38 cm (14 to 15 in) in length. The adult has a green back, blue wings and tail, and grey head. Its underparts and neck are buff. The very large bill and legs are bright red. The flight of the stork-billed kingfisher is laboured and flapping, but direct. Sexes are similar. This species hunts fish, frogs, crabs, rodents and young birds.Stork-billed kingfisher digs its nest in a river bank, decaying tree, or a tree termite nest.