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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