I'm very interested in knowing how one goes about estimating the number
of birds in an area when numbers are large.

Sharon Tierra
Brookline

JoAnn Lafayette wrote:

> A little after 5 this evening there were about 150 crows in the tall
> black locust trees on Shelburne Road near Prospect Parkway.  By
> 5:20 there were 350 making quite a ruckus greeting each other.
> Around 5:30 they headed across Shelburne Road toward Pine
> Street and about 10 minutes later I could see a large flock in the
> distance heading north, probably between Pine St. and the lake.  I
> am interested to know how they choose where to meet.....they
> haven't gathered here that I have seen since the 10th.   I have seen
> them up on Ledge Rd around 3:30 in the afternoon.......at the end
> of last week.  Perhaps it is the weather?  and how does the word
> get out?
>
> There were so many on the Intervale last Saturday around 5 that I
> had no idea how to number them.  Also, there is no where to stop
> nearby to get a better look.  Jo Ann Lafayette Burlington