You have a flying speed equal to your current speed. You may remain aloft for up to 2 hours per day, all at once or in several shorter flights. You regain one hour of flying time when you complete a long rest. Chiropterian cannot wear medium or heavy armor when flying.

Chiropterian rely on and value listening, as such they pride themselves on their acute sense of hearing. You have advantage has advantage on Wisdom(Perception) checks that rely on hearing.

You can move through the space of any creature that is a size larger than you, but you can’t stop in the same space.

You can take the Hide action even when you are obscured only by a creature that is at least one size larger than you.

You have Blindsight of 30 ft., though you lose this trait when you are Deafened.
Due to your heightened sense of hearing, you are vulnerable to thunder damage. You can also issue an ultrasonic screeching sound that only those of bat folk ancestry can hear.