Case file · Cryptid

Thunderbird

A colossal storm-bringing bird across many Native traditions; cited in cryptid 'giant bird' reports.

1,000 BCE · 44.00, -104.00 · status: legend

The sceptical view

A powerful mythic and heraldic being; alleged photographs are unverified.

A sacred mythic being whose cryptid version rests on misjudged large birds and a missing photograph.

Explanation	Weight	Why
A cultural story	52%	The thunderbird is a powerful spirit in many Native traditions; cryptid claims borrow its name.
Something known, misidentified	25%	Large birds like condors, vultures and eagles explain giant-bird reports, including the 1977 Lawndale, Illinois, incident.
A hoax or fabrication	12%	The famous “thunderbird photograph” has never been found and 1890 Tombstone stories were tall tales.
Perception, memory or mind	6%	Size estimation in the sky is unreliable.
Genuinely anomalous	3%	No evidence.
An unknown or out-of-place animal	2%	No evidence of giant birds surviving.

Official position: No official investigation.