Scaly breasted lorikeet. I had a pair of these small parrots in the backyard today. They're not uncommon although I dont see too many at home probably because the more aggressive & larger Rainbow Lorikeets chased them away at every opportunity.
The Little Corella. A very common bird but tough & aggressive toward other parrots, especially when food is involved.
The Galah is another common parrot aound my place.