Note that in his story he states that an individual frog can change
his tone only about 250 to 300 cycles.
I think I have posted this sound bite before but note that this group
of Eastern Narrowmouth Toads of Texas seem to have each individual
calling at a different frequency. I would suspect that this does not
equal the size of the different toads. Work for someone else to play
with.
How each of these toads decide their pitch would be interesting to
also determine. I noted my local treefrogs also have different
pitches for each individual but would need to pull out a group of
examples if someone has interest in more pitch changing frogs and
toads. I suspect it is not rare within 750 cycles. From a non-
research type guy.
Rich Peet
under 400k download at:
http://home.attbi.com/~richpeet/EasternNarrowmouthToad.mp3
--- In Walter Knapp <>
wrote:
> Wild Sanctuary wrote:
> > For those into frogs, check this URL out. Scroll down the page
until
> > you get to Tree Hole frogs from Borneo. It's a large MP3 file but
> > worth it.
> >
> > Bernie Krause
> >
> > http://radio.cbc.ca/programs/quirks/archives/02-03/dec07.html
> >
>
> This also was featured on PBS's "All things considered" several
weeks ago.
>
> I'm not sure it's as unique as they think. I've been observing Gray
> Treefrogs choosing calling sites, and they certainly choose
> acoustically. Though they don't tune their frequency.
>
> There was another frog that I found even more interesting. A frog
that
> can call for over 12 hours continuously without repeating his
calls. And
> appears to do it partially by using two vocal sacs independently:
> http://www.nature.com/nsu/020708/020708-2.html
>
> Wish I had the resources to go and record him.
>
> Walt
>
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