Here (above, left) are some photos of wildlife found at the estuaries in Thailand. The photos include mudskippers, a Squacco Heron, a plover and a Clover. Most of these animals feed on the Crabs and small animals beneath the sand. More information on the mudskippers and the Squacco Heron is on the home (blog) page.
This is a Monitor Lizard, it was not seen in the rainforest but in my hotel swimming pool. It was about 1.5 metres long; Monitor lizards can grow up to 4 metres.