Scientists have found out why birds do not get tired when they fly across the ocean

Scientists have found out why birds do not get tired when they fly across the ocean
Scientists have found out why birds do not get tired when they fly across the ocean
Anonim

German scientists have found that it helps large land birds, which cannot land on the surface of the water and rest, maintain their strength for a long flight across the ocean.

Birds understand the laws of physics and act consciously - they choose the right time and route to make their flight across the ocean as comfortable as possible

Land birds, unlike waterfowl, cannot land on the water to rest, and therefore are forced to cross the sea without landing. Therefore, for a long time, there was a belief among bird watchers that they fly over water obstacles only in narrow places, where the distance from coast to coast does not exceed 100 kilometers. However, over time, birdwatchers began to use small GPS beacons, which showed that in fact birds do not cross large water in very narrow places. But scientists could not understand how they have enough energy for a long flight.

Researchers from the Max Planck Institute for Animal Behavior (Germany) used data on the migration routes of several bird species in their new work. In total, the scientists analyzed 112 sea crossings made over nine years.

These data were compared with meteorological observations and a map of air flows. It turned out that the birds deliberately choose the time and trajectory of flight. That is, they do not just fly to the target in a straight line at a random time.

It turned out that wind and air flows play a huge role in this process. Firstly, birds try to choose the moment when a favorable wind blows. And secondly, they choose a route depending on the strength of the ascending air currents. The more the sea temperature exceeds the air temperature, the more powerful streams are formed. It turns out that the air going up slightly lifts the birds and allows them to flap their wings less and soar without significant expenditure of energy.

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