The Kofiau paradise kingfisher (Tanysiptera ellioti) is a tree kingfisher belonging to the family Alcedinidae, subfamily Halcyoninae. The Kofiau paradise kingfisher is about 34 cm long including its elongated tail feathers, reaching 10–11 cm. The head and upper parts of both male and female are dark blue and the rump, tail and underparts are white. The central tail feathers are long and tapering. The bill is scarlet.