Recently Gene Hunn wrote

"I've been checking the waterfowl action on the north end of Lake Washington
in Kenmore and Lake Forest Park of late. There's 2000 to 3000 water birds
here regularly, 95% of which are coots."

At the north end of Lake Sammammish there are hundreds of coots rafted up.
This occurs each fall. Can anyone help me understand why they form these
large groups at this time of year?

Grant Hendrickson
Redmond, WA
granth at halcyon.com