′′ woodpecker, red-bellied / ′′ woodpecker, red-headed ′′ woodpecker, sowny / ′′ wren, carolina / ′′ wren, house ′′ to / ′′ wren, winter ′′ to / ′′ the area below the entrance hole inside the house should be a bit rough so that birds can get a grip when climbing out. a birdhouse should not have a perch...