[EBB Sightings] Hummingbird "dive-pop"

Having been quite close to "dive-pops" on a number of occasions, I have 
often wondered if the sound -- or part of it -- is being "squeezed out" 
of the bird by the pressure at the end of the dive, rather like a 
mini-"sonic boom," or the crack of a whip.

Arlyn

On Sep 10, 2007, at 8:29 PM, Peter Rauch wrote:

  Perhaps if we knew the "meaning" of the sound(s), we might not 
interpret them as "just coincidental", but maybe as one of the sounds 
(the voiced sound?) being "intentionally" modeled after the other sound 
(the dive tail-pop)?
  Peter