Thunderbird reports from the 1670s

1 case, best-documented first. Page 1 of 1.

We map claims, not creatures. A case is what some source says someone saw or heard, with the link to that source. It is not proof that anything was there, and a retelling counts once, not as a second sighting.

1. 

   Thunderbird · Alton, Illinois · 1673

   Alton, Illinois1 independent source

   Jesuit missionary Jacques Marquette stumbled upon a degraded mural of a bird-like dragon with scales, wings, and horns.