Terror Bird

Terror birds aren't one species, but rather a family of deadly, flightless avian predators. All terror birds are capable of bursts of great speed and have powerful beaks that can tear apart the flesh of their prey.

Terror Bird (Creature 2), Terror Shrike (Creature 4)

Diatrymas are 1st-level creatures akin to terror birds with a weak adjustment. These smaller kin of terror birds sport dark feathers and stand around 6 to 7 feet tall—smaller than terror birds but no less ferocious. Diatrymas are mostly found in drier regions and sport small, orange beaks.