Kookaburras are best known for their unmistakable call, which sounds uncannily like loud, echoing human laughter – good-natured, but rather hysterical, merriment in the case of the renowned Laughing Kookaburra (Dacelo novaeguineae); and maniacal cackling in the case of the slightly smaller Blue-winged Kookaburra (D. leachii).