what are the air-speed velocities of unladen African and European swallows? 

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Request for Question Clarification by neoxenos-ga on 22 May 2002 12:43 PDT

What are the scientific name of the African and European swallows you
want? There are several, for example:
Greater Striped Swallow - Hirundo cucullata 
South African Cliff Swallow - Hirundo spilodera 
 
These are both African swallows. 
 
There also the cliff and barn swallows that may also be considered: 
Hirundo pyrrhonota 
Hirundo rustica 
 
If you want a general answer though, it is  15-45 mph; noted here:
<a href="http://www.birdbarrier.com/BirdBarrier/Site%20Pages/Swallows_id.htm">http://www.birdbarrier.com/BirdBarrier/Site%20Pages/Swallows_id.htm</a>
 
How fast they can go with coconuts tied to them is not noted, however.
 
-neoxenos-ga