Tree trunk sculpture

The village of Campbell town is situated on the Midland Highway between Hobart and Launceston. I was surprised to come across several sculptures in the local park being the work of a local artist.
They are sculptured from a tree trunk and depict animal and insect life in or near the river.
Can you identify what is portrayed?

This is the last Blipfoto from Tasmania but my commitment will continue each day I hope!!!