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Description Size comparison of several giant birds (Aves sensu Charig, 1985) from various periods of geologic time, with modern human for scale. Each grid segment = 1 square meter.
  1. Gigantoraptor erlianensis ( Gigantoraptor, Oviraptoridae, Caenagnathoidea, Theropoda, Saurischia)
  2. Aepyornis maximus ( Aepyornis, Aepyornithidae, Aepyornithiformes)
  3. Utahraptor ostrommaysorum ( Utahraptor, Dromaeosauridae, Theropoda, Saurischia)
  4. Struthio camelus ( Struthio, Struthionidae, Struthioniformes)
  5. Deinonychus antirrhopus ( Deinonychus, Velociraptorinae, Dromaeosauridae, Deinonychosauria, Theropoda, Saurischia)
Date 2009-09-12 05:15 (UTC)
  • derivative work: Jamouse ( talk)

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