Lazy Fat red Sunbird

Aren't you suppose to suck nectar from the flower? You are resting on the branch, very un-typical of you! Tired?
Well, I see your problem, you are too fat to fly in the air in order to obtain nectar! How many flaps of wings you need per second  in order to stay in the air?
In actual fact, sun-birds  do not stay in the air to extract nectar, they stand on the nearest branch to the targeted flower and then jump to another branch for another flower. They seldom stay more than 15 seconds on each flower, perhaps a way to protect themselves being targeted by predators.