The olive-backed sunbird (Cinnyris jugularis), also known as the yellow-bellied sunbird, is a species of sunbird found from Southern Asia to Australia. It is quite difficult to photograph them from a distance as they seem to active to me. Their repeated chirping is however soothing to listen, saw one resting momentarily on a branch and I managed to take some shots before it flew off.

Nikon Coolpix P900