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

Sinister talons: Cassowary deal unarmed strikes with 1d6 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.

Bladelegs: When Cassowary Dash, they may make a single unarmed strike as a bonus action. They are immune to difficult terrain caused by undergrowth or mud.