Comments 15 Share what you think. View all. Bing Site Web Enter search term: Search. Download our iPhone app Download our Android app. Melting icebergs wiped out the grass, Moment polar bear hunts and kills a reindeer is captured on film for the first time in the Arctic Circle Climate change may end the winter migration of birds from Europe to Africa with many already spending an New 'smart bandages' that tell doctors when a wound has healed without them having to check first are See Uranus' mysterious auroras like never before: Scientists create the most detailed map yet of the entire Scientists discover one of the youngest planets ever found - a several million year-old baby that is Hubble telescope spots two 'squabbling' galaxies locked in a cosmic dance that will eventually see the That primate's got rhythm!
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Bishop, who studies high-flying bar-headed geese, told Live Science in an email that the geese do not appear to suffer from altitude sickness or from cerebral or pulmonary edema, "so that, unlike humans they do not feel ill when at high altitude. The geese also hyperventilate to increase their oxygen intake while flying. This rapid breathing makes their blood more alkaline, a change that in humans affects circulation to the brain which is why hyperventilating makes people feel dizzy or faint.
But geese are very tolerant of high pH alkaline conditions , Bishop explained, so blood flow to the animals' brains and bodies remains healthy.
According to Bishop, bar-headed geese use " a roller-coaster strategy " during their long migrations, which can span 1, to 3, miles 2, to 5, kilometers , covered in flight periods that last from 5 to hours.
In fact, he added, 98 percent of the direct observations of the geese's altitude occurred below 18, feet 5, m. And flying higher may actually provide birds with better conditions for long hauls, Scott suggested. Migratory flights at higher altitudes mean exposure to fewer predators, while tail winds can help the birds fly with less effort and cooler temperatures may keep the animals from overheating, he added.
Original article on Live Science. These geese have been tracked flying as high as 7, meters up, and mountaineers have anecdotally reported seeing them fly over summits around Mount Everest that are over 8, meters tall. The geese have been recorded at heights of more than 7,m 23, ft and mountaineers have claimed they have seen the birds fly over Mount Everest.
The researchers used mist nets to catch 15 species of birds at elevations ranging from 3,—10, feet 1,—3, meters. At these elevations, air has between 89 percent and 69 percent as much oxygen as at sea level. Hummingbirds are the only birds that can fly backwards and upside down.
Albatrosses are masters of soaring flight, 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. 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 bird world has its share of amazing migratory feats.
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