Argentavis do not still exist as they are extinct.
Argentavis which are sometimes called the giant teratorn, are an extinct species known from three sites in the Epecuén and Andalhualá Formations in central and northwestern Argentina dating to the Late Miocene, where a good sample of fossils has been obtained
Argentavis were among the largest flying birds ever to exist.
The biggest and fastest bird in the world is the ostrich which can run 43 miles per hour.
The bird that can achieve the greatest airspeed is the peregrine falcon, able to exceed 320 km/h (200 mph) in its dives.
The bird that can fly the longest time without landing is the Bar Tailed godwit bird which can and has flown as far as 8,435 miles non stop from Alaska to Tasmani, Australia.
The 11 day journey of the Bar Tailed Godwit bird that flew without rest or food was tracked by a satellite tag.
There is a bird called the bar headed goose that can fly over Mount Everest as mountaineers have claimed they saw the birds fly over Mount Everest.
The bar headed goose have been recorded flying at heights of more than 23,000 feet.
Bar-headed geese can reach high altitudes during their migration across the Himalayas and Tibetan plateau because they can continue supporting the metabolic costs of flight as the air becomes extremely hypoxic.
The bar-headed goose is a goose that breeds in Central Asia in colonies of thousands near mountain lakes and winters in South Asia, as far south as peninsular India.
Bar headed geese three to eight eggs at a time in a ground nest and they are known for the extreme altitudes it reaches when migrating across the Himalayas.
The bird that flies the longest without landing is the Albatrosses bird which is an amazing bird with amazing energy and strength.
The bird that flies the longest is the Albatrosses bird.
The bird that has been shown to be able to fly for up to 5 years is the Albatrosses which are masters of soaring flight.
The Albatrosses bird is able to glide over vast tracts of ocean without flapping their wings.
So fully have they adapted to their oceanic existence that they spend the first six or more years of their long lives (which last upwards of 50 years) without ever touching land.
The bird that can fly very high in the sky is the Ruppell's Griffon Vulture which is the highest flying bird ever recorded.
The Ruppell's Griffon Vulture bird was recorded flying at a height of 37000 feet which is a bit higher than most airplanes fly.
Airplanes typically fly at a height of 35000 feet.
Some types of birds can and do fly over Mount Everest.
Not all birds are capable of flying over Mount Everest because it's too high of an altitude but some mountain climbers and moutaineers have reported seeing some birds flying over Mount Everest.
The birds that can fly over Mount Everest are birds such as the bar-headed goose.
My friend saw a bar headed goose fly over Mount Everest a few years ago when he visited Mount Everest.
It's rare to see birds fly over Mount Everest but it does happen.
Most birds though fly below the altitude of Mount Everest so it's a rare sight to see birds flying over Mount Everest although you might see some birds flying near or around Mount Everest though