My son is a birder and birds do have a language of sorts. They have a 
spring song, warning or alert song, mating songs, and I am sure a host 
more. He can identify the specific bird before he sees them, an 
excellent skill since he is colorblind, and can call to them and get a 
response.

Also, we tend to think that other species a hear like we do, but many 
have broader ranges of hearing either lower, higher or both. Think Fido.

When you get into the world of harmonics and carrier waves I think we 
are venturing beyond Occam's Razor. It would seem that a species would 
keep language as simple as possible to convey information. It took some 
time before FM radio came along because it was more complex and not 
intuitive.I have some difficulty trying to determine just how an 
organism would create a carrier wave and modulate it to convey 
information. Nature operates mostly on KISS.

It is nice that it is spring and we are talking about the birds and the 
bees.

Bill Truesdell
Bath, Maine

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