[cobirds] Sparrows change their tune to be heard in noisy cities

I have often wondered and asked some of the knowledgeable people on this group about the effect of noise on bird song communication.
Today I ran across this interesting Science Daily article. The original citation should have more information.

http://www.sciencedaily.com/releases/2012/04/120402162710.htm#.T3oxTjXuLSE.gmail

Jeremy Winick
Westminster, CO

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