qT=2&tQ=Which bird is nicknamed the "laughing jackass" because of its unusual cry?&tC=Whooper swan|Laughing gull|Kookaburra|Jabberwocky&cC=3&fB=Loud and disturbing, the kookaburras' laughing cries are hauntingly human-like. The birds produce a chorus crazy laughter as they roost at dusk and then again when they wake at dawn.<br><br>The laughter is so loud that it wakes many animals (including humans) each morning, earning the kookaburra the nickname "bushman's clock."