You may have thought they went "Ribbit ribbit" but you'd be wrong...in fact they sound more like...
http://www.i-am-bored.com/bored_link.cfm?link_id=24944
Don't Annoy The Frog!
http://www.i-am-bored.com/bored_link.cfm?link_id=24944
Don't Annoy The Frog!