When you name your movie "Bats" everyone has a general idea what the monster is, though they might not imagine something which looks like a winged Pug. You heard me, those ugly little dogs which appear to have run muzzle first into a wall, with wings. Oh, and they're mean, real mean.
Despite an interesting beginning the movie quickly degrades into frontal lobotomy territory, not the least of which is a patented military response. First off they're determined to eradicate the bats through bombs and antitank missiles, then an attempt to destroy the roost at night gets them all killed, since most recruits have at least high school diplomas these days I'd say our public education system is worthless. Not that it would matter, the creatures at hand are nigh invulnerable, only serious firepower can harm them. Bats (Even mutated ones.) are fairly light, this facilitates the miracle of flight, a female ballet dancer rolling over one would do some damage. Except to this variety, it just gets them mad.
By the way, Sheriff Kimsey is the best shot I've seen in my life, any guy who can score perfect shooting at flitting targets with a pistol is a God.
After losing half the town's population to an attack everyone is evacuated, except the civilian researchers who barricade themselves into the school. Why they stayed in town I have no idea, but it gave McCabe a chance to degenerate into mad scientist mode just prior to his death.
With an air strike scheduled to bomb the bat's cave (Huh?) it's up to Sheila and Kimsey, they must carry out the original plan: Turn on a huge refrigeration unit and freeze the creatures to death. Too bad for the bats, they're only highly intelligent when the script requires... ...such as destroying a member of the swarm when it has been captured and fitted with a tracking device, the idea to change caves after being discovered never dawns on them.