This illustration has been in my files for ages. I can’t remember where or when I first saw it, or who the illustrator is, but it’s always been a favorite.

I like pen and ink, the story has a cheeky irreverence to it (I always suspected possums were closet, or tree-top, drinkers!) and gives a knowing nod to the part played by chance, or luck, in evolution and the survival of species.