As an Aaracockra you have learnt how to use your flight ability to your advantage

you gain the following benefits:

• Increase your Dexterity or Wisdom score by 1, to a maximum of 20
• You gain proficiency in Perception, if you did not already have it, and may add twice your Proficiency bonus to such checks.
• If you are flying and dive at least 20ft straight towards a target, you may make an unarmed strike against them as a bonus action, using your Dexterity modifier for the attack and damage rolls.