So how far can it carry a coconut? To go from airspeed, mass and wingspan to range, check out The Simple Science of Flight for it's application of the Breguet range equation to biologics.

From the page:
"We now need only plug in the numbers:

U ≈ 3fA
f ≈ 15 (beats per second)
A ≈ 0.22 (meters per beat)
U ≈ 3*15*0.22 ≈ 9.9

... to estimate that the airspeed velocity of an unladen European Swallow is 10 meters per second."