Joy O'Keefe and her team test many bat box designs, including the flat-front boxes shown here. Their work shows overall design and small design elements make a big difference in temperature inside ...

The first thing you’ll notice at the Louisville Slugger Museum & Factory is the Big Bat. It’s a 120-foot-tall steel replica of a bat used by Babe Ruth. Step inside the museum to find the Big ...

The big brown bat is the Adirondack’s largest bat; only the hoary bat is larger. The long, lustrous fur is brown. The ears, wing and tail membranes are black. Total length is 105-123 mm (4.1-4.8 in).