On Wed, 16 Apr 1997, Nick Spang wrote:

> Do any of you know a good diameter that I could use to block out the
> beasts, but let in the meek?

Nick and other birdhouse builders,

Here's a new Web page with a proven birdhouse design that's certainly good
for VG Swallow's plus some other species. It has two possible openings
that will keep Sparrows out.

VGSW house = http://weber.u.washington.edu/~dvictor/VGSWhouse.htm

Should you not wish to construct your own note the link from this page to
the Rainier Audubon page where you can obtain a similar birdhouse.

Happy housing,

Dan Victor, Seattle, WA <dvictor at u.washington.edu>