Flying past enemies in combat does not provoke opportunity attacks. 

You are a bird. That makes you small, hard to hit, and used to interacting with small things. You get a +2 bonus to dexterity.

You are a bird. You are tiny. Small wounds are deadly to you. 

Your beak is a natural weapon. Use your dexterity + your proficiency modifier to attack. You deal 1d4 damage + your dexterity modifier. 

Your claws are natural weapons. Use your dexterity and proficiency modifiers with your attack roll. You do 1d4 slashing damage + your dexterity modifier. 

Birds are hard to sneak up on. You have a high passive perception and a natural proficiency in perception. 

Any languages you could speak before you became a bird you speak no longer. Your language is Bird. You can understand Auran, Common, and any other languages you knew before becoming a bird but you can't speak them.