"Just before commencing the roll, we noticed many birds flying just at some height above the center of the runway."
warning: slf-generated content here:
Why would you start your take-off at all in that case?
Wouldn't calling the bird-control team be a better option?
Sorry, as a SLF, I would prefer NOT being launched into a potential disaster - you were stationary and should have stayed that way until the birds were scared off.
