Highlights during the day for me were many and varied (pretty much everything that happened was awesome). Just a few of the interesting shorebirds we saw were Red-necked Avocets, Banded Lapwings, Red-kneed Dotterels, Black-fronted Dotterels, Common Greenshank, Marsh Sandpipers, a single female Ruff (Reeve), Sharp-tailed Sandpipers, and many Red-necked Stints. The Red-kneed Dotterels were special as we came across a group of breeding individuals, and one approached the car doing the typical plover broken-wing display.
A male Flame Robin graced us with his presence on a roadside field while groups of tiny Purple-crowned Lorikeets fed above us on some flowering trees.
Whistling Kites, Black Kites, Australian Kites, and Swamp Harriers were all plentiful. A single male Spotted Harrier also showed himself a few times in addition to two Brown Goshawks, two Australian Hobbies, and three Brown Falcons.
Welcome Swallows were also plentiful and in amongst them we found one Fairy Martin and one Tree Martin.
Flocks of Zebra Finches were everywhere along with one Red-browed Firetail.
The reed beds were full of shy Golden-headed Cisticolas and we got a couple fleeting and very far away views of Little Grassbirds.
With a little persistence we were awarded with good looks at a couple of Australian Crakes and a Buff-banded Rail. A couple Spotless Crakes also called but never showed themselves.
One of the most amazing things about the treatment plant was the sheer numbers of waterbirds. Ducks by the tens of thousands. Clouds of Australian Shelduck and Pink-eared Ducks rose into the air at every pond. The Pink-eared Duck is a tiny duck with a huge shovel-like bill (that I think also looks like a catamaran) named for an intense but very small pink patch locating at the ear and I've been thinking a much more appropriate name would be Zebra Duck for their intense full body black and white striping. Of course, I just looked that up, and they are also called Zebra Duck, just not as commonly.
Australian Darters were another very interesting species for me along with Royal and Yellow-billed Spoonbills, Straw-necked and Australian Ibis, Little and Cattle Egrets.
A couple far-away views of a pair of Brolgas (the Australian crane) was very memorable especially as they took off calling.
I also enjoyed the small White-fronted Chats as they ran about on any flat surface they could find.
At the end of the day a pair of Black-faced Cuckooshrikes were special as they flew about in a small wooded area.