thanks Dennis. I may need a recording for a book project I'm working on, but
not until next fall/winter. I'll check out your mp3.
Lang
> on 3/12/02 5:21 AM, [dhysom] at [compozarts.com] wrote:
>
> Lang,
>
> I have a lot of recordings of Coqui frogs from Puerto Rico. You can hear
> one mp3 file at http://www.compozarts.com/coquis.mp3
>
> Dennis
>
>
>
>> Walt:
>>
>> Do you by any chance have recordings of the Coqui?
>>
>> Lang
>>
>>> Marty Michener wrote:
>>>
>>>> I completely agree and extend your suggestions to birds you usually hear in
>>>> mixed flocks - as far as I know there is no software or sound products that
>>>> enable learning this discrimination. I recall Chan Ribbon, in 1957, next
>>>> to about 700,000 mixed blackbird roosting (evening) population, explaining
>>>> to me which sounds were the starlings (most), which the cowbirds and which
>>>> (rarest) were Red-winged Blackbirds. I was and am still amazed at this
>>>> man, although there is a long impressive line ahead of me.
>>>
>>> We tend to talk as if birds (or frogs) have a call. They have a vocabulary.
>>>
>>>> Flocks especially noteworthy are roosting flocks and nesting colonies of
>>>> swallows and herons. I have a recording from Stone Harbor, NH in 1957 and
>>>> I have no idea which of the 8 or so species visible make which sounds -
>>>> except for the occasional gull. This is a great point you make, Walt, I
>>>> wish now Stone Harbor was in stereo.
>>>
>>> I did not think it mattered much until I started recording in stereo.
>>> Now I really don't want to record in mono.
>>>
>>>> Of course frogs in general produce calls with the evolutionary idea of
>>>> attracting adults of their species, whereas songbirds mostly use sound to
>>>> repel their own kind. Roosting bird sounds presumably are in the
>>>> attracting department, like frogs.
>>>
>>> Frogs have not only attracting calls, but territorial ones. Plus a few
>>> others. You'd only have to spend a night here when the Cope's Grays are
>>> calling to pick them up. They set out there squabbling over a few inches
>>> on the edge of the half cask that's their favorite breeding spot. Some
>>> nights there is more squabbling than calling for females. However, those
>>> nights tend to produce the most eggs too. There's so much squabbling
>>> because there are more of them and limited space.
>>>
>>> Probably the classic example is the Coqui frog. It's call sounds like
>>> it's name. And, in this case a single call is both. The Co part is the
>>> territorial warning to other males, the qui is the attracting the female
>>> part. And what's more, the hearing of these frogs is wired
>>> appropriately, the males are more sensitive in the range of the Co, and
>>> the females the qui.
>>>
>>>> How would you classify the human noise at a football game?
>>>
>>> Noise, definitely repelling. At a distance it's almost white noise.
>>>
>>> Walt
>>>
>>>
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