greater yellow-headed vulture

they say it's hard to tell Greater from Lesser, except for size (always a useful diagnostic tool when you dont have them side by side!). Iridescence on the back feathers and habitat ( tropical forest rather than savannah) points strongly towards the Greater.

I have always had difficulty in separating Greater Yellow-headed from Lesser Yellow-headed Vulture but, when perched, the wingtips of lessers extend way beyond the tail tip, and in flight have very narrow, long wings with high contrast between coverts and flight feathers.