Bat (heraldry)

For other uses, see Bat (disambiguation).
Ratpenat (the Crest of the Bat), a heraldic symbol of the former Crown of Aragon.
Teruel city coat of arms.

The bat (also called the reremouse, reermouse, or rearmouse) is a heraldic symbol sometimes used as a charge, but most prominently used as a crest on or around the crown in municipal arms of the former Crown of Aragon—specifically in Valencia, Catalonia and the Balearic Islands.