Cullendulla Creek Nature Reserve is home to mangrove estuary (and two mangrove species, the grey and river mangroves), forest red gums, littoral rainforest, and sea grass beds.
The reserve is also a fish nursery for the Clyde River. Unsurprisingly then, a substantial mix of forest and shorebirds visit the area annually, including white ibises, curlews, two species of spoonbill and several of duck. Migratory birds come from as far away as Russia, taking refuge in the warm weather.
The nature reserve contains important and unusual dune formations called cheniers. Roughly parallel to the shoreline, these long, low (3-6m) and narrow ridges overlay estuarine mud and are of great scientific interest for the information they provide about the evolving landscape - some 7000 years worth of changes.
There are nine beach ridges at Cullendulla; the most northerly two are cheniers. Though they're not directly visible to visitors, a fascinating boardwalk tracks through the mangrove estuary, accompanied by signs which offer a keen insight into the local ecosystem. For the best overview, visit in both high and low tide and compare the differences.