What I’m looking at on Wikipedia, right now.

Die Fledermaus (The Bat) is an operetta composed by Johann Strauss II to a German libretto by Karl Haffner and Richard Genée.

Being a newcomer to Opera, learning about this Opera triggered a memory from 12-year-old me.

For the Tick character, see Die Fledermaus (The Tick).

Continuing on…

The appellation was most likely given due to the popularity of the Johann Strauss II operetta Die Fledermaus and is pronounced as such (not as it appears in English). To English-speakers not familiar with the German language, his name sounds like “Deflater Mouse.”

I’ve heard the overture before.