It isn't a great photo but the bird is. Well, for us here in Queensland anyway. It is common in Asia and its cousin, the Western Yellow Wagtail, common in Europe I think.
My friend and I discovered this bird at our local wetland (Dowse Lagoon) where I often get bird photos. I recently bought a spotting scope and we were using it on Sunday afternoon when we came across this unusual bird. We were fairly sure after seeing its yellow breast and distinct eyebrow that this wasn't an Australian bird and checking the field guides we identified it as the Eastern Yellow Wagtail.
This is a rare vagrant to Queensland. Sometimes sightings are reported in the far north of Australia. Many birders and twitchers have come to our local wetland over the last few days to get a sight of this bird.