“What kind of bats swing upside down?”/“Acro-bats.”

A riddle about bats is:
 
Q: What kind of bats swing upside down?
A: Acro-bats.
 
The “acro-bats” pun has been cited in print since at least 1993.
 
           
27 October 1993, Victoria (TX) Advocate, “Ha-Halloweens,” pg. 8D, col. 2:
What kind of bats swing upside down? Acro-bats.
 
Google Books
World’s Wackiest Riddle Book
By Evelyn Jones
New York, NY: Sterling Publishing Company, Inc.
2014
Pg. 7:
What kind of bats swing upside down?
Acro-bats.
 
Twitter
❄ Mae Loke ❄
@maegloke
Q: What kind of bats swing upside down?
A: Acro-bats.
#joketime
3:17 AM - 8 Jul 2011
   
Twitter
Abi Lee
@jedimittens12
Replying to @wendyyyyho
@EmeraldSoGreen what kinda bats swing upside down?
ACRO-bats :D
4:44 AM - 25 Jun 2012
 
Reddit—Jokes
What kind of bats swing upside down?
submitted October 7, 2018 by Swumpting
Acro-bats!
(From my 6 year old)