Pictures

The adults are black and white, but the juveniles are usually light grey and white.

I've done some more Googling, and it looks like there are multiple species of butcherbird. I was most familiar with the grey butcherbird, which stays grey into adulthood. These guys were probably pied butcherbirds, with their notable black "hood" that visually distinguishes them from magpies.

noisy mynahs

Noisy miners? Or Indian mynas?

I don't see mynas very often, but see miners all the time. They were a real dick yesterday, with one giving me a close swoop, and then proceeding to swoop to scare away a water dragon. These ones in the photo though were pretty chill. They hung out with the songbirds for the time I was watching, not particularly seeming bothered by them.