Kathleen Anderson asked in a  post to Mobirds:

Subject: broad-tailed hummingbird
From: Kathleen Anderson <andersonka AT CENTURYTEL.NET>
Date: Mon, 16 Jun 2008 16:05:36 -0400

I would be interested in how the broad-tailed hummingbird produces the wing
whir and how it can "turn it off".

Kathleen Anderson, Columbia

From the book, "Hummingbirds of North America" by Sheri Williamson
"WING SOUND of adult male is a bright silvery trill, created by modified 
outer primaries.
Immature and molting males are silent, but there is evidence that the sound 
can be deliberately muffled."


Probably, after being banded AND being harassed constantly by male AND 
female Ruby-throated Hummingbirds,
this bird does not want to announce it's presence so it can slip in to 
actually get a sip at the feeders.
IF (!!!) birders remain quiet or at least hold it down to a low din, the 
trill can be heard easily even at a distance if one can
hear upper range sounds.

HOPE the bird is still around.........ANY WORD folks?

Good birding,
Charlene Malone
St. Louis co.
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