No bats in the belfry, but at the Orient Land Trust.  One of my favorite warm-weather activities is to visit the San Luis Valley where up to 250,000 free-tail bats spend the summer.  A small group pot-lucked then drove to Valley View Hot Springs.  Our guide gave us a brief history of the area mining operations, while I craned my neck for any glimpses of nude people (it's clothing optional). Saw some!  After a 45 minute hike, we smelled the caves.  At dusk, a detector announced the flight of the bats.  About 6 inches wide, their wings whooshed as they clicked along (their form of communication, which probably translated to "Look the humans are out!")  This male-only colony travels up to 50 miles and eats an estimated 2-3 tons of insects EACH NIGHT!  Weeks later, my husband is still talking about it!