Even though it is no longer alive, Argentavis Magnificens is considered to be one of the biggest flying birds ever to have lived, and it is still the world's heaviest flying bird to this day.
It is also known as the gigantic teratorn, and it is a species that has only been discovered at three locations in the Andalhuala and Epeceuen formations in central and northern Argentina. It is thought to have existed during the late Miocene period (Huayquerran).
In addition to possessing a humerus that was slightly shorter than the length of a whole human arm, the argentavis magnificens also had sturdy, muscular legs and plump feet, which enabled it to walk with relative ease.
What size were they?
It was believed that the wingspan of Argentavis magnificens was about 7-8 metres (23-26 ft) and that it weighed approximately 80 kg, despite the fact that the technique of measuring or scale used to determine the wingspan may vary (180 lb).
With its legs extended, it had an estimated height of around 1.5-2 meters (4.5-11 meters) while standing, which was about the same as a human's. Its entire length, from the tip of its bill to the tip of its tail, is about 3.5 meters (11 ft 6 in).
What enabled them to fly was a mystery.
The shape and size of Argentavis magnificens' wings suggest that it was mostly able to fly by soaring and only sometimes utilized the flapping technique for a brief amount of time. Because of its projected minimum flying speed of 11 metres per second (36 feet per second) or 40 kilometers per hour (25 miles per hour), the gigantic teratorn was most likely utilizing thermal current throughout its journey.
Aside from that, the climatic conditions of the Andean foothills in Argentina during the late Miocene were thought to be warmer than they are today, which is thought to have aided the big bird in its ability to remain in the air on thermal updrafts.
What did they eat was a mystery.
Their diet includes armadillo young or infants, rodent-like animals, possums, and possibly capybaras, which may have been a source of food for this massive teratorn.
Because of the absence of predators, the gigantic teratorn had a life expectancy of more than 50-100 years. As a consequence, they perished at an advanced age, in an accident, or as a result of illness or injury.
How did they become extinct in the first place?
The gigantic teratorn became extinct at the end of the Pleistocene epoch, which is about 10,000 years ago, and was replaced by other dinosaurs. Because of climate changes that happened at the conclusion of the last ice age, extensive ecological modifications and prey shortages developed as a consequence of human actions, which was responsible for this.
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