Sunbirds are pretty little birds very like Australian honeyeaters or American hummingbirds in size and form, although the resemblance is due to similar lifestyles and convergent evolution, not to close family relationships. They feed on nectar, supplemented with insects and spiders. Their nests are little hanging baskets, and the one in my pictures was engaged in collecting construction material.
The one I photographed is a female, though you would hardly know from the first photo: the males are distinguished by a gorgeous iridescent bib (follow the link below, to Ian’s site, to see one).
Wikipedia tells us there are 132 species of sunbirds ranging from Africa through southern Asia and just into Australia. The only Australian species is the one pictured here, Nectarinia jugularis, and it is restricted to coastal Queensland. It is usually known in Australia as the Yellow-Bellied Sunbird, although Ian Montgomery notes on Birdway that ‘Olive-backed’ is used by both Birdlife International and Christidis & Boles to avoid confusion with the Variable Sunbird (N. venusta) which is also called the ‘Yellow-bellied’.