Splendid Fairy-wren - Malurus splendens
The female, seen here, has a distinct pale brown ring around the eye. Although common in parts of the metro area they seem to be on the decline. Their sudden absence from my own garden coincided with the arrival of a pair of Laughing Kookaburra. (pers obs) This species of wren is often seen 5-7 meters high up in trees and tall shrubs. It moves around in small groups within its territory.