Could be an immature Vine Leaf Hopper (never seen one up close like your photo) I give them a good pyrethrum spray as they are rife in the garden now ,they develop into this. http://en.wikipedia.org/wiki/File:Scoly ... _nymph.jpg corvus n
Thanks, guys. Looks like you've got him nailed. I sure got a surprise, never having come across such a beastie before. I was with you, Ollster - couldn't stop staring. Had a bit of trouble believing my eyes.
Just thought I'd mention...The Australian Museum website allows you to submit photos of animals etc for ID by their experts...we've used it a couple of times (for a lizard and a caterpillar). It's an excellent service.