How the Savannah sparrow’s song has changed over 30 years

[newfoundlander61]

http://www.thestar.com/news/canada/2013/02/08/how_the_savannah_sparrows_song_has_changed_over_30_years.html

[thouc]

Very interesting.

[Brian Bailey]

Sounds like a plot to get us to update our birdsong recordings! :wink:

I've long been aware of geographical differences but never thought they might change over time.  Now that I have thought about it, I guess it's not really that surprising.  It will be interesting to see how it changes (or changes back) over the next 30 years.  

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