Your Dexterity score increases by 2.

Chiropterai have a comparable lifespan to humans.

Chiropterai have a tendency towards neutrality.

Chiropterai are about 5 feet tall. They have thin, lightweight bodies that weigh between 80 and 100 pounds. Your size is Medium.

Your base walking speed is 25 feet.

You have a fly speed of 30 feet. To use this speed, you can’t be wearing armor or holding anything. You must also carry less than 5x your strength score in extra weight to use this. (You can't be encumbered as per the variant encumberance rules.)

You have Blindsight out to 15 feet and advantage on Wisdom (perception) checks that rely on hearing. Due to your sensitive hearing you also have vulnerability to thunder damage.

You can see in dim light as if it were bright light out to 60 feet.

You have disadvantage on attack rolls and on Wisdom (Perception) checks that rely on sight when you, the target of your attack, or whatever you are trying to perceive is in direct sunlight.

You have the ability to communicate in a limited manner with bats. They can understand the meaning of your words, though you have no special ability to understand them in return. You have advantage on all Charisma checks you make to influence them.

Your claws are natural weapons, which you can use to make unarmed strikes. If you hit with them you deal slashing damage equal to 1d4 + your Strength modifier.

You can speak, read and write Common, and Sylvan.