Your Dexterity score increases by 2, and your Constitution or Wisdom score increases by 1.

Thri-Keen have lifespans shorter than humans. They reach maturity around age 8 and live to around 30.

Thri-Keen are generally chaotic neutral, as they are mostly focused on self preservation.

Thri-Keen are shorter than humans standing at around 5 feet tall.

Your base walking speed is 40 feet.

You can see in dim light within 60ft of you as if it was bright light, and in darkness as if was dim light. You can't discern colors in darkness, only shades of grey.

Thri-Keen have a hard carapace  that covers most of their body. As a result, when you're not wearing armor, you add 2 to your AC.

Your long jump is up to 20 feet, and your high jump is 10 feet with or without a running start.

Your mandibles are natural weapons, which you can use to make unarmed strikes. If you hit with it you deal piercing damage equal to 1d6 + your Strength modifier instead of the bludgeoning damage normal for an unarmed strike.

You don't require sleep and magic can't put you asleep. You can rest while remaining alert, and can do light tasks such as reading or keeping watch.

While you aren't wearing armor you can hide even if you only lightly obscured. Additionally Wisdom (Perception) checks to spot you are at disadvantage if you are adjacent to natural objects, such as a tree or a cave wall.

You can speak, read, and write Common and Thri-Keen. Thri-Keen is a peculiar language, instead of using words, they employ mandible clicking and antenna waving.