The remnant forest in the wetlands and Irrawong Reserve is part of the last significant stand of swamp mahogany forest in Sydney. It forms a corridor of important habitat linking the wetlands, the Ingleside escarpment and the coastal forests of Garigal and Ku-ring-gai Chase National Park. Palaeoecological studies indicate that the wetlands began as a coastal lagoon over 6000 years ago, which slowly infilled with sand and evolved into a freshwater habitat. Read more