The Great Egret Trail travels along the Harvey River to Lake Clifton Road. The Harvey River headwaters are about 10km north of historic Hoffmans Mill in the Stirling Dam catchment area. Within its catchment there are five dams and a weir. From them run river diversions and drainage systems which supply water to the area's famous dairy and beef cattle and vegetable and citrus industries.
The Great Egret (Ardea alba), the largest of the Australian egrets, is unmistakable. Standing 830mm tall, it has white plumage and, when not breeding, a yellow bill. During the breeding season (October to December) the bill turns mostly black. At this time, long hair-like feathers (nuptial plumes) on the back extend beyond the tail. It can be observed standing on its long, thin legs on the edges of waterways, quietly waiting for prey.