(Posted this over on Bat ponies and Thestrals, but thought it might be useful here as well)

I put together the name "moori" for the bat pony race in one of my stories, and so far, I've gotten fairly good reception on it. Could work as both a singular and a plural:

The diner doors popped open once more as frantic moori mare of the Midnight Guard flew inside, desperately searching for her princess.

Ponies, unicorns, pegasi, and moori trudged about, dragging bags of sugar and trays of cupcakes from Joe’s ‘quarantine’ hooflocker into the cobblestone streets outside.

I quite like "Thestrals" as well, but it's a touch dramatic, and I believe it's from the Harry Potter series, so it might carry a similar connection to the wraith-like monsters.

If anyone wants to use it, by all means. Thought I'd throw it out there as a possibility.