
But how do you mention BATS
and leave out sonar?
The Big Bang Theory Season 8, Episode 21

(MIMICS BATS SUCKLING)
The Big Bang Theory Season 6, Episode 23

Uh, a swarm of bloodthirsty BATS
fly through the dungeon.
The Big Bang Theory Season 6, Episode 23

(MIMICS BATS SUCKLING)
The Big Bang Theory Season 6, Episode 23

And sonar is based on BATS.
The Big Bang Theory Season 11, Episode 8