Thunderbird is a term used in cryptozoology to describe large, bird-like creatures, generally identified with the Thunderbird of Native American tradition. Similar cryptids reported in the Old World are often called Rocs. Thunderbirds are regarded by a small number of researchers as having lizard features like the extinct pterosaurs such as Pteranodon. Reports of Thunderbird sightings go back centuries,[1] and the fossil record does show that giant birds (teratorns) with wingspans between 12 and 18 ft (3.7 and 5.5 m) were likely contemporary with early man. Today the creature is generally regarded as a myth.


This article deals with modern sightings (the last 200 years) of such a creature, reported as real, as opposed to mythological accounts, though believers in the phenomenon often use the Native American legends in attempts to support their claims.

There is a story that in April 1890, two cowboys in Arizona killed a giant birdlike creature with an enormous wingspan. It was said to have had smooth skin, featherless wings like a bat and a face that resembled an alligator. This description has some similarity to that of a prehistoric pterodactyl, an animal whose existence was known at the time. They are supposed to have dragged the carcass back to town, where it was pinned with wings outstretched across the entire length of a barn. A picture of this event may have been published in the local newspaper, the Tombstone Epitaph. has an account of this story with the events taking place in the state of Texas.[2]

According to Mark Hall, the Epitaph did indeed print a story about the capture of a large, unusual winged creature, on April 26, 1890. Beyond this single story, however, no one has made historic corroboration that this event ever occurred; it is usually considered anurban legend. Utterly fictional tall tales were not an uncommon feature in newspapers during this era.[3]

No one has ever produced a copy of the "Thunderbird" photograph, though numerous people, Ivan T. Sanderson being one of the better known, have made claims to its existence. Sanderson claimed to have once owned a copy of the photo, which vanished after he loaned it to an acquaintance in the 1960s. The television program Freaky Links staged a similar photo, giving new life to the "Thunderbird Photograph" legend.[4]

Jerome Clark speculates that the description of the basic image in question (men standing alongside a winged creature nailed to a barn), is evocative enough to implant a sort of false memory, leading some people to vaguely "remember" seeing the photo at some distant, imprecise time.[5]

Bigfoot researcher and cryptozoology author Loren Coleman wrote about a series of thunderbird sightings in the 1940s. On April 10, 1948, three individuals in Overland, Illinois spotted what they originally thought to be a passing plane, but after seeing a large set of flapping wings, they realized this "plane" was something very different. A few weeks later, in Alton, Illinois, a man and his son saw what they described as an enormous bird creature with a body shaped like a naval torpedo. The creature was flying at at least 500 feet and cast a shadow the same size as a small passenger airplane.[6]

Similar sightings around the same time in St. Louis, Missouri prompted residents to write concerned letters to then St. Louis mayorAloys P. Kaufmann demanding that the city do something about these reportedly huge birds. The mayor instructed an administrative assistant to set a trap to catch one of the creatures, but when blue heron tracks were discovered on an island in the Meramec River, the mystery was considered solved.[7]

There was a spike in Thunderbird sightings in the late twentieth century. On occasion, such reports were accompanied by large footprints or other purported evidence.

Among the most controversial reports is a July 25, 1977 account from Lawndale, Illinois. About 9 P.M. a group of three boys were at play in a residential back yard. Two large birds approached, and chased the boys. Two escaped unharmed, but the third boy, ten-year-old Marlon Lowe, did not. One of the birds reportedly clamped his shoulder with its claws, then lifted Lowe about two feet off the ground, carrying him some distance. Lowe fought against the bird, which released him.

Viewed by some as a tall tale, the descriptions given by the witnesses of these birds match that of an Andean condor: a large black bird, with a white ringed neck and a wingspan up to 10 feet (3 m).[8] However, an Andean condor's talons are not strong enough to lift heavy objects. Loren Coleman and his brother Jerry interviewed several witnesses after the reported event.

In 2002, a sighting of a large birdlike creature, with a wingspan of around 14 feet (4.3 m), was reported in Alaska.[9] The Anchorage Daily News reported witnesses describing the creature like something out of the movie Jurassic Park. Scientists suggested the giant bird may have simply been a Steller's sea eagle, which have a wingspan of 6–8 feet (1.8–2.4 m). There had also been previous reports of similar creatures in the same area around that time.

As recently as 2007, sightings have been claimed in the area around San Antonio, Texas.[10]

As mentioned above, some cryptozoologists have theorized the ancient Thunderbird myth to be based on sightings of a real animal with a mistaken assessment of its apparent size.[11] Some skeptics have claimed such a large bird could never have flown, but several flying creatures with huge wingspans are indeed known. The prehistoric vulture-like Argentavis magnificens had a wingspan of around 7 m (23 ft) and was capable of flight. The massive Cretaceous-era pterosaur Quetzalcoatlus northropi (or perhaps Hatzegopteryx thambema) was the largest known flying creature in history,[12] with a wingspan of around 12 m (40 ft).[13] However, the Thunderbird's identity as a pterosaur is unlikely because the pterosaur is extinct. A pterosaur's wings were made of a membrane of skin stretched over a bony finger, similar to a bat's wings. San Antonio based cryptozoologist Ken Gerhard believes it is a teratorn.[14]

Cryptozoologists also posit that the Thunderbird was associated with storms because they followed the drafts to stay in flight, not unlike the way a modern eagle rides mountain up currents. John A. Keel claimed to have mapped several Thunderbird sightings and found that they corresponded chronologically and geographically with storms moving across the United States.

Angelo P. Capparella,[5] an ornithologist at Illinois State University, argues that the existence of such undiscovered large birds is highly unlikely, especially in North America. There is not enough food, Capparella says, in many areas where abnormally large birds are reported. Perhaps more important, according to Capparella, is the lack of sightings by "the legions of competent birdwatchers ... scanning the skies of the U.S. and Canada" who sometimes make "surprising observations" with cameras at the ready (see for example 20th-century sightings of the Eskimo Curlew). Were there breeding populations of large, unknown birds, Capparella contends they could not remain unknown very long.

There is one genus of extinct flightless-birds from the Americas that has been named Brontornis, whose name literally means "thunder-bird"; however few, if any, cryptozoologists regard this bird as the origin of the Thunderbird because of its flightlessness.

Legendary giant BIRD of North America. See 

Etymology: From the thunderous flapping of 
its wings or possibly from its northern migration 
to the Pacific Northwest in the spring or 
rainy season.

Variant names: Achiyalabopa (Pueblo), Alkuntam 
(Bella Coola/Salishan), Animikii (Ojibwa/ 
Algonquian), Ba’a (Comanche/Uto-Aztecan), BIG 
BIRD, Binesi or Pinesi (Ojibwa/Algonquian), 
Chequah (Potawatomi/Algonquian), Cullona 
(Malecite/Algonquian), Culloo (Micmac/Algonquian), 
Dukwally or Theukloots (Makah/ 
Wakashan), Hahness (Chehalis/Salishan), Huhuk 
(Pawnee/Caddoan), Kunna-kat-eth (Tlingit/ 
Na-Dené), Kwunusela (Kwakiutl/Wakashan), 
Mechquan (Ossippee), Met’co (Montagnais/ 
Algonquian), Nunyenunc (Shoshoni/Uto- 
Aztecan), Nu-tugh-o-wik (Inuktitut/Eskimo- 
Aleut), Omaxsapitau (Blackfoot/Algonquian), 
Pach-an-a-ho (Yakima/Penutian), PIASA, Pilhannaw 
(Ossippee), Sanuwa or Tlanuwa (Cherokee/ 
Iroquoian), Tse’na’hale (Navajo/Na-Dené), Yello- 
kin (Miwok/Penutian).

Physical description: White ruff. Bald head. 
Wingspan, 9–70 feet, with most reports agreeing 
on 10–18 feet.

Behavior: Said to cause thunder by flapping 
its wings. Feeds on live mammals and carrion. 
On the West Coast, said to attack and carry off 
whales. Nests on high cliffs. Generally benevolent 
toward humans but sometimes carries them 
off to its nest in its talons.

Distribution: Throughout North America but 
with specific legends at Mount Edgecumbe, 
Alaska; Tombstone, Arizona; Alpena, Michigan; 
Whiteside Mountain, North Carolina; Blount 
County, Tennessee; Thunder Mountain, Wisconsin; 
and southern Alberta, Canada. To a lesser 
extent, the West Indies and South America.

Significant sightings: Thunderbirds are often 
depicted in rock art with outstretched wings, 
feathers prominent, and zigzag lines representing 

An atypical Thunderbird pictograph is found 
in Black Dragon Canyon, 15 miles west of 
Green River, Utah. Painted by an artist of the 
Fremont culture (A.D. 900–1100) using a darkred 
pigment, the bird is 7 feet long from wingtip 
to wingtip and has a crest, batlike wings, and a 

Claude Schaeffer recorded several accounts of 
Blackfoot Indians seeing Thunderbirds in Alberta 
and Montana in the nineteenth century. 
In 1879, the daughter of Red Paint, Mary Jane, 
and her white husband saw four huge birds at 
Chief Mountain, Glacier National Park, Montana. 
In 1897, Big Crow and his wife saw a large 
bird with a feathered ruff and bald head on the 
southern section of the Blackfoot Reservation. 
The most recent sighting was in 1908.

Many cryptozoologists have memories of seeing 
a photograph of a Thunderbird being held 
up against a barn by some 1880s-era cowboys. It 
was said to have appeared in an Old West or 
men’s magazine of the 1960s, but to date, no 
one has turned it up. Karl Shuker thinks that in 
some cases, people may be misremembering an 
old photo of a Marabou stork (Leptoptilos crumeniferus) 
held with its wings outstretched by 
three Africans. Mark Chorvinsky has found that 
a dubious account of a huge, winged monster 
shot by two ranchers in the Huachuca Mountains 
of Arizona did appear in the Tombstone 
(Ariz.) Epitaph for April 26, 1890, but with no 
accompanying photo. He also thinks the original 
source for the Thunderbird photo story was 
Hiram Cranmer of Hammersley Fork, Pennsylvania, 
who also claimed to have seen a Pennsylvania 
THUNDERBIRD (see entry below) in 1922.

Possible explanations: 
(1) The California condor (Gymnogyps 
californianus) is the largest U.S. vulture, 
reaching a length of 4 feet, a wingspan of 9 
feet 4 inches, and a weight of 20–25 
pounds. It is black, with white wing linings, 
and has a naked, red-orange head that 
changes color with its mood. In 1987, the 
few remaining wild birds were caught for a 
captive breeding program; reintroduction 
began in 1992 in remote sites of Los Padres 
National Forest, California. Fossil remains 
of this bird have been found in New York 
and Florida, as well as Arizona and New 
Mexico in the Pleistocene. There is evidence 
that these condors returned to the 
Southwest as early as the 1700s in response 
to the introduction of large herds of cattle, 
horses, and sheep that replaced the extinct 
Pleistocene megafauna as a source of 
(2) A surviving teratorn, a member of a 
family of predatory fossil vultures that 
resembled reptiles in some ways. Their jaws 
were designed to swallow living prey, but 
their talons were not capable of seizing 
things. They probably used their sharp, 
hooked beaks to catch animals. The largest 
known flying bird, Argentavis magnificens, 
weighed 158 pounds, stood 5–6 feet tall, 
and had a wingspan of 23–25 feet. It lived 
in Argentina in the Late Miocene, 8–5 
million years ago. In North America, 
Teratornis merriami weighed about 36 
pounds and had an 11 foot 6 inch–12 foot 
6 inch wingspan; T. incredibilis of Nevada 
and California lived in the Pleistocene and 
had a wingspan of 17–19 feet. 
(3) See BIG BIRD for other possibilities.

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