Tweeters,

I've put together a map showing the location of (all ?) known
migration roost sites in Washington and Oregon. Each chimney is
represented by one of 43 red Xs. It's kind of neat, and might suggest
an answer to the question of how the swifts find their way durning
migration.

Because the map takes up 520KB I'm not going to attach it so that
all of Tweeterdom has to deal with it. If you would like to view it,
send me a reply and I will get it off to you same day. Don't need to
type anything.

Larry Schwitters
Issaquah