[CT Birds] Sibley Quiz on Estimating Numbers
mantlik at sbcglobal.net
Wed Aug 15 22:28:42 EDT 2012
Estimating numbers of birds in a flock accurately is a true art, and takes much
experience and practice. As an exercise in this pursuit, please go to David
One can practice further on one's own by scattering lentils, coffee beans, etc.
on a table and guessing the total.
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