Southern Pobblebonk frog

Limnodynastes dumerilii insularis

Also called a banjo frog. I found this one while gardening, burrowed in a pile of very old bonfire ash. It is common around this part of Victoria and makes a very distinctive 'bonk' noise.
That's four different types of frog I have found recently in the garden. I expect there may be others too.

BIGGER is more blue!