While Thunderbirds are mainly consider a myth by many, reports of these large birds have been documented for a very long time. This species seems less well suited for predation aerodynamically than its relatives. In the late 1980s, noted cryptozoologist Roy Mackal led an expedition into Namibia from which he had heard reports of a prehistoric-looking creature with a wingspan of up to 30 feet.

Then a pair of wings unfolded from its back and they practically filled the whole road. Argentavis Magnificens or Giant Teratorn (Extinct).

Giant Flying Cryptid Reports Increase in Pennsylvania From Researcher Stan Gordon www.stangordon.info There has been a long history of giant bird sightings in Pennsylvania. They were giant prehistoric birds. Maybe that wind storm earlier this summer forced it down". This occurred near a swamp in Rhodesia where the man suffered a large wound in his chest that he said was caused by the monster's long beak. As a rule of thumb, a wing loading of 25 kg/m² is considered the limit for avian flight. - Dr. Jane Goodall during interview with NPR and asked about Bigfoot. †Argentavis Most sightings of this creature occurred in the 1970s and 1980s.

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Since A. magnificens is known to have been a land bird, another good point of comparison is the Andean condor, the largest extant land bird going on average wing spread and weight, with a wingspan of up to 3.3 m (10 ft 10 in). The body of the creature was taken to the nearby town of Gray, according to the story, where it was identified as a pterodactyl by a student of paleontology. Unlike extant condors and vultures, the other species of teratorns generally had long, eagle-like beaks and are believed to have been active predators, being less ponderous than Argentavis. As described to Gordon, the bird-thing stood at least four feet tall, with a "dominant" head poised above the car's roof line. She assumed it was just his imagination and thought no more about it, until the next year when Mothman sightings started being reported on in Point Pleasant West Virginia.

Thunderbird: Open to speculation because these birds, most often sighted from Pennsylvania to the northern Midwest, have been said to resemble teratorns and pterodactyls. Tamm... Mystery Couple Seen At Cumberland Falls   Cumberland Falls located in Corbin, Kentucky is a very popular tourist destination and with... Julia - Strange ocean sounds This Post By TCC Team Member Dorraine Fisher. The creature had thick black, leathery skin, a beak full of sharp teeth, long talons for feet, and membrane-like wings that spanned 10 feet, 7 inches, by their measure. [1] See more ideas about Prehistoric animals, Paleo art, Prehistoric. Several adults saw a man-shaped thing in the sky. Comparison with extant birds suggests it laid one or two eggs with a mass of somewhat over 1 kg – somewhat smaller than an ostrich egg – every two years. If … Rube fired a rifle shot as the beast scooped up the screaming fawn and flew away as, leaving the torn up doe with her eyes pecked out. Thunderbirds: America’s Living Legends of Giant Birds. [6][7] Argentavis had an estimated height when standing on the ground that was roughly equivalent to that of a person, at 1.5 to 1.8 m (4 ft 11 in to 5 ft 11 in), furthermore its total length (from bill tip to tail tip) was approximately 3.5 m (11 ft 6 in).

large rodents, small armadillos and the young of large animals such as ground sloths. It had a very muscular upper torso and the wings were as if they were its arms.

Even so, it allows a fairly accurate estimate of its length in life. Adkins fired on it, crippling its wings and waded into the creek to capture it alive. unexplained activity, working with, (Interested in sponsoring a story? Witness Edward Cook reported three sightings of a creature near his home, on Clear Fork Road. Reports of Thunderbird sightings go back centuries, [1] and the fossil record does show that giant birds with wingspans between 12 and 18 ft (3.7 and 5.5 m) were likely contemporary with early man. Its wingspread is something enormous. †Aiolornis Argentavis may have used its wings and size to intimidate lone land predators of their kills. Argentavis Magnificens or Giant Teratorn (Extinct) Argentavis magnificens (literally "magnificent Argentine bird") is the largest flying bird ever discovered. Ducks belong to the family Anatidae, with geese and swans. Visible marks of the attachments of contour feathers can be seen on Argentavis wing bones.

Mortality must have been very low; to maintain a viable population less than about 2% of birds may have died each year. However, the long beaks and wide gapes of teratorns are more like the beaks of eagles and other actively predatory birds than those of vultures. Hall and affiliated with Loren Coleman, both well-known cryptozoologists, this book should serve as a solid introduction to the phenomenon. — A registered nurse says she saw a giant bird in Hot Springs County that he claims was not able to immediately identify. ", Argentavis, the largest flying bird, was a master glider, "Physical limits of flight performance in the heaviest soaring bird", "Palaeoenvironmental and faunal inferences based on the avian fossil record of Patagonia and Pampa: what works and what does not", BBC News: Ancient American bird was glider, Secret of flight for world's largest bird revealed, https://en.wikipedia.org/w/index.php?title=Argentavis&oldid=986831948, Wikipedia articles needing page number citations from July 2020, Creative Commons Attribution-ShareAlike License, Height: 1.5 to 1.8 m (4 ft 11 in to 5 ft 11 in), This page was last edited on 3 November 2020, at 08:00. It probably preferred to scavenge for carrion, and it is possible that it habitually chased metatherian carnivores such as Thylacosmilidae from their kills. Argentavis may have been an exception, as its sheer bulk would have made it a less effective hunter, but better adapted to taking over other predators' kills. Thank you.

Argentavis may have used mountain slopes and headwinds to take off, and probably could manage to do so from even gently sloping terrain with little effort.

There have been many modern-day sightings of creatures that by eyewitness description sound like pterosaurs, or pterodactyl sightings. The single known humerus (upper arm bone) specimen of Argentavis is somewhat damaged. The ability to fly is not a simple question of weight, except in extreme cases.

[16] Argentavis may have used mountain slopes and headwinds to take off, and probably could manage to do so from even gently sloping terrain with little effort. They were tracking deer through the woods near the base of Owl Head Mountain when they heard the cries of a doe. He held it wide open as if to taste the air. From the size and structure of its wings it is inferred that A. magnificens flew mainly by soaring, using flapping flight only during short periods. A new genus of small teratorn from the Middle Tertiary of the Taubaté Basin, Brazil (Aves: Teratornithidae). On February 7th 1895, Deputy Sheriff Rube Nihiser and his son would become the first people to actually see the beast. Pterosaurs were not dinosaurs, but a family of large flying reptiles ("pterosaur" means "winged lizard") that includes the pterodactyl and Pteranodon. According to other sources, the men actually were Turks, and the animal was a actually a swarm of bats. "I have never seen anything like this before. Resplendent Quetzals - The Rare Jewel Birds of the World. †Oscaravis Abe and Mildred, with son John, rushed to find the girl battling with "an incredibly large crow". The species would've required about 2.5 to 5 kg (5.5 to 11.0 lb) of meat each day. "I slowed," she said years later, "and as we go closer we could see that it was much larger than a man. By using LiveAbout, you accept our, The Top 10 Most Mysterious Creatures of Modern Times, Stories of Live Animals Sealed Within Stone, Chupacabras: The Blood-Sucking Creature from Hell, Anomalous Artifacts Are Pieces Out of Time, These Photos of the Paranormal Will Have You Seeing Things, The Most Mysterious UFO Cases of All Time. At one time, wingspans have been published for the species up to 7.5 to 8 m (24 ft 7 in to 26 ft 3 in) but more recent estimates put the wingspan more likely in the range of 5.09 to 6.5 m (16 ft 8 in to 21 ft 4 in). It may have flown and lived much like the modern Andean condor, scanning large areas of land from aloft for carrion. In fact, the family Teratornithidae includes at least five species of prehistoric birds, with a sixth species disputed. Its wingspan easily was as wide as the two lane road which we were on".

[12] The heaviest extant flying birds are known to weigh up to 21 kg (46 lb) (there are several contenders, among which are the European great bustard and the African kori bustard). As they passed through a sector of the edge of a park known as the Chief Cornstalk Hunting Grounds, a tall man-like figure suddenly appeared on the road in from of them. T. merriami was small enough (relatively speaking) to take off with a simple jump and a few flaps. And are among the largest birds to ever fly. The following are sightings of large bird creatures that are too short to have their own individual page on the wiki: In the mid-1850's, during a six-day battle of the Crimean War, on March 14th, a band of five Russian soldiers crept towards the center of the battlefield, planning an ambush just after midnight.

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