The following information I obtained from Google:
"The 'Kookaburra' is considered to be an Aboriginal word meaning 'laughing jackass'.
The kookaburra is the largest genus of the kingfisher family, with some measuring up to 20 inches (about 50cm) long. And the fluffy bird, whose name comes from the Aboriginal word guuguubarra, also has a formidable beak, making quick prey of lizards, snakes, mice and insects."
Click on the URL following to hear a Kookaburra laughing: