[Maine-birds] estimating bird numbers

We've all struggled with counting birds, especially large flocks.  Jan Pierson forwarded this link that provides many pics of large flocks.  The idea is to estimate the first image and then click on the image to get the actual count.

You'll be amazed.

http://www.martinreid.com/Main%20website/estimatingind.html

Thanks Jan.

Best,

Peter