Choose one Ability Score to increase by 2, and another Ability Score to increase by 1.

You can speak,read and write Common. In addition, you can speak Perran which has no script. Perran is a melodic language of honks, whistles, thrills and hisses. 

If you and an ally are flanking an enemy, you have advantage on intimidation checks against that enemy.

You can use your action to emit a loud honk. Choose a number of creatures equal to your proficiency modifier within 60 feet of you that can hear you.
Each chosen creature has disadvantage on its next attack roll You can use this once per long rest.

As a Perroh, you are resistant to the cold.

Your arm feathers help you glide. When you fall, you can use your Reaction to negate up to 30 feet of fall damage as you use your wings to begin gliding downward.