http://www.forsythaudubon.org/Activities/HawkWatch.aspx

Douglas Rogers writes:

Unbelievable siting today at work. Around 10 in the morning I
happened to look up at the clouds, (imagine that) and what I saw was truly
awesome. There was a flock, no, more like a swarm of migrating Broad wing hawks.
There were so many in one thermal that you could see the multiple cores as the
gaggles climbed out. The whole event lasted at least 10 minutes. Within that
time we witnessed at least 300 hawks top out, go on glide and more hawks enter
the thermal low and climb out and go on glide to the south.