Bats

Bats were flying creatures of the night, traditionally associated with the forces of Morgoth and of Sauron. They were most famous in Middle-earth for taking the part of the Goblins during the Battle of Five Armies.

Portrayal in Adaptations

2007: The Lord of the Rings Online:

Bats are found in caves throughout Middle-earth, epsecially in Moria. They are frequently the pets of Morrivals.