Phorusrhacidae

Phorusrhacidae are a family of carnivorous birds that survive the K-T mass extintion 65.5 Millyon years ago they are commonly called terror birds.They also replace thier own ansesters the small and medium size theropod dinosaurs.One of the earliest terror birds is grastormis.Terrorbirds rulled the earth until the Tertiary Period,where the large carnivorous mammals begin to appear and the olny place where terror bird can thrive is south america.5 milyon years ago South America and North America collide and sabare thooth cats,bears,amphicyon and wolves complete the Terrorbirds

(((Kindom:Animalia  Phyla:Chotodorates   Class:Aves   Oder:Cariamiformes )))Family:Phorushacidae