Climb: Harpy Eagles gain a climb speed of 35 feet.

Keen sight: Avians have advantage on Perception skill checks that rely on sight.

Talons: Avians deal unarmed strikes with 1d4 slashing damage.

Ground charge: If Terrorbirds move at least 15 feet in a straight line toward a creature and hit with a melee attack, the creature must succeed on a Strength saving throw (DC = 8 + Strength modifier + proficiency bonus) or be knocked prone.

Mountain reaper: If Harpy Eagles successfully grapple a creature and jump upward on the same turn, they may release the creature mid-air to deal fall damage. Once per long rest, Harpy Eagles can shriek to cause enemies within 10 feet to make a Wisdom save or become frightened until the end of your next turn.