Working in the creek it becomes apparent how fragile the system is. Under every rock is a home. I don't like to move them around. There was a big yabbie under one yesterday! At first i thought it was a giant fly beetle. Yabbies are tough scavengers. They have the ability to live in pour water quality and long periods of drought. They are sometimes called the vacuum cleaner of fresh water environments, eating decaying plant and animal matter.
In early colonial times the creeks were striped of there sand, gravel and stones to build houses, roads etc.