On Fri, 5 Jun 1998, Charles Evans wrote:

> In my yard, House Sparrows have built nests in two bird houses
> designed to allow Violet Green Swallows to nest but to exclude House
> Sparrows. One of the houses has an openning on the front that measures
> 3 1/2 inches wide and 1 inch vertically, with rounded corners. The other
> has a 1 1/2 inch round entrance on the bottom of the house.

Charles--

I have a birding buddy who kept reducing the size of the
hold until the sparrows could no longer get in there..
He did it, as I recall, by covering the hole with a
piece of plywood that had a smaller hole drilled in
it..you might try that..

good luck..

Tom