Corky's back! To talk to us about bats, bats, and more bats! -- primarily the Mexican Free-tail Bat which is so plentiful under the I-80 freeway at the causeway. Size, shape, habit -- all the things that one can know about these insect-devouring friends -- that's what Corky Quirk has for us today. And then there are the mysteries that scientists still haven't learns. The crack in the attached image is less than 2 inches wide.