Batgender

 is a faunagender centered around bats and/or vampires. One's gender may be impacted by bats, best described as bat-like, or otherwise related to bats/vampires in some way.

Alternate Names
Back in 2014-2016, owlgender, nocturnalgender, and moongender were used alongside batgender.

Definitions

 * very very strong when it is dark out, but weak/nonexistent when it is light out - passengender on tumblr, 2014
 * a xenogender/kingender that feels vampiric or batlike in nature. encompasses parts of witchery, like the moon cycle - elftooth on tumblr, 2019

History
Batgender was coined on August 24, 2014 by tumblr user passengender (who turned out to be a troll) via MOGAI-Archive. It was re-coined on October 27, 2019 by tumblr user elftooth. The flag was created at the same time.