Terror Bird

The terror bird has advantage on attack rolls against a creature if at least one of the bird's allies is within 5 feet of the creature and the ally isn't incapacitated.

Terror birds who move at least 20 feet straight toward a target have advantage on the next attack roll against that target.

Melee Weapon Attack: +6 to hit, reach 10 ft., one target. Hit: 14 (3d6 + 4) slashing damage.

The target must succeed on a DC 12 Constitution saving throw or take 7 (2d6) slashing damage at the beginning of its next turn.

The Queen of Birds (see page 30) is guarded by a special variety of terror birds with crimson plumage and a golden-green crest rarely seen elsewhere. These terror birds are called red queens, and they are especially savage. They gain multiattack for two serrated beak attacks, and they gain a limited form of levitation, which allows them to "run uphill" on empty air or to cross chasms. This movement must be completed between two portions of solid ground within two turns (with Dash actions, a red queen bird can move up to 200 feet over empty space). Red queens have a challenge rating of 4 (1,100 XP)