[CT Birds] Estimating numbers - a Sibley exercise

Frank Mantlik mantlik at sbcglobal.net
Fri Dec 4 08:17:33 EST 2015


Greetings,Just in time for Christmas Bird Counts, David Sibley has posted an exercise in estimating (bird) numbers on his website.  Have fun.
http://www.sibleybirds.com/w/index.php?title=Sibley_Birds

Frank MantlikStratford


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