Thunderbird reports from the 1850s
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.
Thunderbird · New York · 1851
An old Indian was carried westward by a great bird, fought off young thunder birds with fire from their eyes, and returned home wearing the skin of one.