Fwd: wing and tail sounds

[Dave Mellinger <>]

This is forwarded from  via "pjgaddis" 
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Many birds (e.g. ducks, guans, snipes, hummingbirds, doves, nighthawks, etc.
etc.) produce aerodynamic sounds with their wings and/or tail as they
fly.  Is anyone aware of a formal term for this type of sound?  The only
name I know is a "wing whistle".   But this name is informal--
aerodynamically speaking, the mechanism is emphatically NOT a whistle.  I've
been casting around for other names for it (feather tones? aerodynamic
wing/tail sounds?), but these seem a bit inelegant.  Bioacoustics is not my
specialty, so anyone has ideas regarding what these kinds of sounds could be
called, I would appreciate the input! 

Sincerely,
-Chris Clark