Thunderbird reports from the 1920s
6 cases, 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 · Glacier National Park, Montana · 1927
The text reports that Piegan Indians believed Chief Mountain was the home of a Thunder Bird which caused thunder and lightning.

Thunderbird · 1922
[name] reports seeing a large bird flying over his gate in April 1922 with an estimated wingspread of 35 feet.

Thunderbird · Washington, District of Columbia · 1920
An elk hunter reports seeing a very big bird sitting in a tree and taking a feather from its wing.

Thunderbird · Olympic Peninsula Gardens, Washington · 1920
An Indian guide reports a thunderbird of monstrous size nesting under ice that produces noise and lightning by moving and flashing its eyes.

Thunderbird · Scenic, South Dakota · 1923
Chief Flaming Arrow reports that the Thunder Bird dwelt in the Bad Lands area southwest of Scenic, S.D., which Indians call a 'bad place' and has never been visited by white men.

Thunderbird · Kevin, Montana · 1920s
Witness reports that a Thunder Bird was overcome by a snow storm and descended into the Piegan camp before flying away among storm clouds.