phorusrhacidae, also terror bird. 3d

america american assumed becoming birds carnivora carnivorous closely crocodiles during dwelling enormously family flightless forests fossils found ground groups grow illustration increasingly large mainly mammals marsupial million missing most mostly neogene only order paleogene phorusrhacidae phorusrhaciden predators prey quick recent related savannas sebecidae slow south sparassodonta specialized terrestrial terror time together top while years