House wrens are small birds, four and a half to five and a four inches in length.
They have dull, grayish-brown upperparts and duskier bars on their wings and tails. Their underparts are grayish-white, with buff throats and breasts. A thin, light eye ring and a narrow grayish eyebrow may be visible. Click here to hear their Song. They prefer to nest in natural cavities in trees, stubs, or fence posts, but often nest in birdhouses.