Originally Posted by
IBOHUNT
You will have to be more specific. There are 47(!) different species of African Swallows.
You first have to establish the frequency of wing beats and the amplitude of each wing beat. From that you could derive the speed in which the little critter flys...
Or you could do what the rest of the kids do these days -> Google
Now the bigger question is...
Are you suggesting coconuts migrate?
We also have to take in to account that two may work together with a piece of string.