The Tufted Titmouse is one of four specie of Titmouse found in North America.  It is a small gray bird with a slight crest.  Titmouse use a natural cavity, woodpecker hole, or man made box for nesting.

Titmouse excited with it's crest raised.

Tufted Titmouse nest in a Bluebird Nest Box.

Titmouse nesting in a natural cavity.