Bevy of Bats? Nope!

Although I do like the alliteration of "Bevy of Bats," it is incorrect.  I have read that a group of bats can be called a Colony, a Camp, or a Cloud. Doesn't sound quite as snappy, though, IMHO.  (:  Are there more bats visible at this time of year or are we just more aware of them during this ghoulish season?
Photo courtesy of George Goldman.