[CT Birds] Cross Bill Types

Mark Aronson markaronson at gmail.com
Fri Nov 30 17:07:44 EST 2007


Hi Red Crossbill Curious,

For those interested, I found the below a fairly good site to explore
the different cross bill notes and sizes.

http://research.amnh.org/ornithology/crossbills/


my best,

aronson




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