From: Brian Finch <birdfinch@gmail.com>
Date: 2015-03-31 09:39
Subject: Flock estimation and the WHite Pelican count.
Dear All,
Here is an interesting exercise on the White Pelican flock that flew
over the house yesterday. I would have guesstimated about 750 birds,
and was amazed with the result.
See the grid attached,
Best to all
Brian