Originally Posted by Tourist
I'm slightly confused as to what you are saying.
You are aware that there are 10kg birds on this planet?
Of course. In fact by coincidence I recently mentioned the albatross in a now deleted post. Perhaps you saw it briefly.
I'm replying to a post asserting that for equivalent size a collection of a few circuit boards and battery etc is very light compared to a bird.
I gave a well-known example of some electronics that is 10 times heavier than about the same size bird and still over double the weight of a larger bird.
We could find other examples, such as quadcopter advertising that says 500 to 2000 gram payload plus its own weight on 4 x 10 inch rotors, but as a first approximation maybe the claim is a bit stretched much of the time.