Humanity harmful effect on migratory birds. This information provided the workers of science after long observation.
According to the statements of the German workers of science, because of human activities birds do not fly away to warmer climes, but remain in the place where they were and feed with garbage cans.
Storks, preferring to feed on landfills, are more likely to survive the winter than their migrating to the south counterparts, found scientists from the Max Planck Institute in Germany.
Many migratory birds to change their habits under the influence of man.
Until recently, all European white storks fly away for the winter in Africa, but now many are moved only short distances, preferring to look for food in landfills.
White storks live across Europe, in the north-eastern Africa and western and central Asia.
An international team of scientists, who led Dr. Andrea Flak from the Institute of Ornithology of the Max Planck in Germany, has selected 70 young storks from eight countries and pinned him to the GPS sensor in front of their first migration.
The researchers tracked the flight of storks who were born in Armenia, Greece, Poland, Russia, Spain, Germany, Tunisia and Uzbekistan. The findings are published in the journal Science Advances.
It turned out that the storks from Russia, Poland and Greece, followed the tradition and continue to fly away for the winter in Africa, sometimes flies to the south of the continent.
However, storks from Spain, Tunisia and Germany remained north of the Sahara. Storks from Armenia flew at a relatively short distance, and storks from Uzbekistan remained at home.
Thanks to the research scientists were able to confirm the hypothesis that the less energy is spent bird, the greater their chances of survival during migration . Apparently, the birds become this strategy when it comes to minimizing the cost of energy. Perhaps it is for this reason that storks are increasingly opting to abandon the migration for food in landfills. Thus, for example, happened to the white storks from the south-western Germany, to interrupt their journey in Morocco.
The question of how good or bad these trends for birds, is still open.
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