A review of sonograms published on the website www.xeno-canto.org for
brush-finches (Atlapets sp.) reveals many species with songs and calls in
the range of 8-11 kHz.
http://www.xeno-canto.org/browse.php?query=Brush-Finch&pagenumber=&order=taxonomy&view=3
Allen T. Chartier
[EMAIL PROTECTED]
Inkster, Michigan, USA
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----- Original Message -----
From: <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Wednesday, March 19, 2008 9:23 PM
Subject: Songbird audiograms
Thank you Dr. or Mr. Stoker for pointing out Bob Dooling's extensive
research (much of which is on budgerigars, to be sure) and other important
points. The literature on this topic is not thin or hard to find.
I would like to add that there are species of nearctic/neotropical
Dendroica warblers whose songs extend above 6 and even above 9 or 10 kHz,
as can be readily seen in the classic Robbins et al. guide published by
Golden Books. These are different species from those in question, of
course, but they certainly are songbirds. The target listeners are
probably conspecifics.
Ron Larkin
