Eye-Bats

 or Eyeball Bats are creatures residing in Gravity Falls, Oregon.

History
When Ford Pines went to live on Gravity Falls to find more about the supernatural creatures, the Eye-Bats were among the creatures he managed to find, capture, put in a jar and write about in his journal. In the same flashback, one of the Eye-Bats is also pinned on in Ford's room.

An Eye-Bat is seen at the end of Ford's dream in the nightmare realm in "The Last Mabelcorn," near the Bill Cipher Wheel.

Appearance
The Eye-Bats look like eyeballs with bat-like wings at the side. They appear to be bioluminescent, as their bodies emit light.