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Keywords:gastornis, flightless bird, ornithology, Paleocene, Eocene, giant, bird, prehistoric, raptor, G. giganteus, huge, talons, feathers, biology, Diatryma, dinosaurs, terror birds, phorusrhacids, beaks, wings, cassowary, plumage, scales, predator, ostrich, Gastornithidae, fossils, bones, paleontology, illustration, forest
