Wing flapping
It seems to mean many things. The male does this when in his newly found nest box as in the video above. The female does this when demanding food as part of the mating and it also seems to reinforce the bonds between male and female. It is also used practically when the female is sitting on the nest and requires food.
The young also use it when newly fledged to indicate they want feeding.
I'm guessing it is a general...
