[zeestephen]

I lived in south Florida for 35 years and never saw a bat, let alone a swarm of bats.

Dade and Broward County are urbanized all the way to the Everglades, so there aren't all that many mosquitoes to begin with.

If you release swarms of bats around Miami Beach, they'll just hang out in the fruit trees or around the dumpsters at Publix.

[Does so]

I lived in south Florida for 35 years and never saw a bat, let alone a swarm of bats.

I lived in Dade County for 45 years, and never saw a bat. Bats were imported from Texas for the "Bat Tower" in the Florida Keys. They stayed a day, and all flew off.

Over-rated, unfortunately:

http://labs.russell.wisc.edu/mosquitosite/preventing-mosquito-bites/bats-and-birds/