Keen sight - The Struthiomimus has advantage on Wisdom(Perception) checks that rely on sight.

Pack Tactics - The Struthiomimus has advantage on an attack roll against a creature if at least one of the Struthiomimus's allies is within 5 feet of the creature and the ally isn't incapacitated.

Trampling charge - If the Struthiomimus moves at least 20 feet straight toward a creature and then hits it with a kick attack on the same turn, that target must succeed on a DC 14 Strength saving throw or be knocked prone. If the target is prone, the Struthiomimus can make another attack with its kick against it as a bonus action.

Multiattack - The Struthiomimus makes 2 Kick attacks and one peck attack

Kick - Melee weapon attack: +4 to hit, reach 5ft, one target, Hit: 7 (1d6+3) bludgeoning damage 

Peck - Melee weapon attack: +4 to hit, reach 5ft, one target, Hit: 4(1d4+2) Piercing damage