Hi Al,
Check out a book called "A World of Watchers". It is a fascinating
history of birdwatching in the US. Each chapter is about a different
person who advanced the practice of birding. One chapter is about a
woman in Ohio who studied the Song Sparrows on her family land. She
got so she could identify individuals by voice and plot their nesting
territories from year to year.
At 10:47 AM 2009-06-29, Pastor Al Schirmacher wrote:
>How diverse are Song Sparrow songs?
>
>Recently I heard one sing a classic song, then end in three trilling
>notes; on the way back from lunch today I heard one sing two opening
>notes like a Vesper, then continue as normal. Do they learn from
>other sparrows near their territory? Do juveniles struggle with
>their initial songs? Is hybridization an issue?
Good birding,
Steve Sosensky,
SoCA Bird Guides <steve at sosensky.com> www.sosensky.com/guides
Nature Photos www.sosensky.com/nature_photos.htm
Optics4Birding <steve at optics4birding.com> www.optics4birding.com
Aliso Viejo, CA 92656 949-269-2161 33.56485 N, 117.72205 W
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