This tiny bird is an Eastern Spinebill. They are very shy and often sit in the dark hidden away from Butcher birds and from me. 25 years ago I decided I wanted Spinebills in the yard so planted Grevillea Orange Marmalade shrubs, they love this plant. Spinebills have lived there ever since. They sound like wind chimes, tiny little bell sounds as they dart about. I hear them but rarely see them. 41 degree celsius heat today brought them to the water bowl at my back door and this is only the second time I have been quick enough to photograph one.