The Thunderbird is an enormous avian cryptid resembling a vulture, sometimes depicted with reptilian or Pteranodon-like features. Reports of Thunderbird sightings and encounters extend back centuries. In the ancient world, giant mythological birds were referred to as Rocs. This cryptid’s name draws from American Indian legends of a large spirit bird (Lakota: Wakį́nyąn) associated with thunder, lightning, and the cardinal direction West.

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