Greater Double Collared Sunbird drinking nectar from flowers

This is a male Greater Double Collared Sunbird and, like other sunbirds, he is a small, busy bird with a curved bill perfectly suited to taking nectar out of flowers.
The Greater Double Collared Sunbird is extremely similar to the Southern Double Collared Sunbird, but it is a lot bigger and has a longer, heavier bill. Another main difference is that the red band on the male's chest is a lot wider than that on the Southern Double Collared Sunbird.
They can be quite greedy/entitled and often chase other birds away from flowers.
All birds have relatively high metabolic rates and the high sugar content of nectar, whether it is natural nectar from flowers or supplemental sugar water provided in nectar feeders, provides an exceptional energy source to fuel birds' active lifestyles. Birds need the enzyme sucrase in their bodies, in order to digest the sucrose of nectar and this is why they generally only eat nectar from certain flowers.
Nectar-eating birds are called nectivorous if nectar makes up a large proportion of their diet.
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Greater Double Collared Sunbird on Birding Planet filmed by Rory Wilson.

[@debanandasengupta3846]

Thank you so much for sharing. Beautiful images.
May I know the name of the plant/flower where the bird