Melbourne Water's Western Treatment Plant located near Werribee is one of the most popular sites for birdwatching in Victoria, with 284 species of birds recorded there from south eastern Australia and the east Asia. The plant's lagoons, grasslands and coastline provide an ideal and varied habitat for birds with a permanent water supply, plenty of food, and little interference from humans.
http://www.melbournewater.com.au/getinvolved/activities/birdwatching/pages/birdwatching.aspx