gastornis are an extinct genus of large flightless birds that lived during the eocene. generative ai

animal extinct gastornis diatryma bird prehistoric dinosaur plumage paleocene terror flightless eocene 3d illustration feather wings predator biology ornithology carnivore eggs raptor prey bones carnivorous nest ostrich paleontology scales extinction fossils talons territory giant cassowary miocene beaks fighting gastornithidae huge phorusrhacids phorusrhacos generative ai