If they violated the copyright, condemn them to hard labor, since they pretend to be working men and not musicians (harrummpff).

"Kookaburra" by Marion Sinclair is copyright by Larrikin Music Publishing Pty Ltd., International copyright secured.
Americans wishing to use the song contact the USA office at:
The Copyright Department, Music Sales Corp., 257 Park Avenue South, New York NY 10010.

The kididdles.com website gives the lyrics, "used with permission."