The azure kingfisher (Ceyx azureus) is a small kingfisher in the river kingfisher subfamily, Alcedininae.
The azure kingfisher measures 17–19 cm in length. It is a very colourful bird, with deep blue to azure back, a large white to buff spot on the side of the neck and throat, rufous-buff with some blue-violet streaks on the breast and flanks. The feet are red with only two forward toes. The lores (the region between the eye and the bill) are white and inconspicuous except in front view, where they stand out as two large white eye-like spots which may have a role in warding off potential predators.