The phrase "if you build it, they will come" apparently didn't apply to some of the bat houses built in Madera Canyon a decade ago to provide cozy condos for the area's flying mammals.

Bats didn't use the largest of the original houses in the canyon south of Tucson, and experts with the Bat Conservation International group suggested the bat boycott might stem from the fact that the large houses were vulnerable to scorching heat and high winds.

The upshot: The "bat mansions" were replaced with smaller houses three years ago, and at least some bats have begun taking advantage of the more modest digs.

Video by Arizona Daily Star's Doug Kreutz.