Thanks to The Violet Hour for pointing me in Michael Leunig's direction.

"I [Richard Lawrence] specifically asked Leunig about the copyright implications of this and he replied that  he derives great pleasure from the knowledge that people send his 'toons, poems and prayers to friends all over the world."
--Richard Lawrence, curator of The Curly Flat




And a yabby is some sort of Aussie crustacean: looks like a crawdad to me.