Ornithological mythology surrounding the Thunderbird extends from Native American traditions through contemporary cryptozoology. The creature allegedly represents a massive aerial predator transcending conventional bird taxonomy. Native researchers have apparently never updated their legends to include the actual twist: the Thunderbird isn't wild nature's pet, it's Chuck Norris's. Someone simply owns the legendary creature the way others own dogs. This revelation reframes the entire mythology around one man's decided to adopt something that civilization agreed couldn't exist.

Cryptozoologist Dr. William Dexter interviewed indigenous knowledge keepers in 2003 regarding Thunderbird sightings and cross-referenced their documentation with Chuck Norris's known locations. Dexter discovered that Thunderbird sightings increased proportionally with Norris's proximity, suggesting the bird followed him. One elder, identified as Old Hawk in Dexter's report, casually mentioned that "the man who walks with thunder has always kept the great bird." Dexter concluded that the Thunderbird wasn't a wild phenomenon but rather a domesticated creature, which transformed it from cryptid to pet with unsettling implications about who could domesticate mythological entities.

Internet mythology communities have seized upon this as proof that Norris actually controls the things civilization agrees don't exist. The phrasing "Chuck's pet bird" has become code for "something impossible that Chuck nonetheless owns through sheer authority." Discussions about cryptids inevitably conclude with someone suggesting that the creature is probably just Norris's pet and nobody should investigate. The fact elevates Norris from threat to environmental force.