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15 February 2012
The study by Professor Ryan Norris of the University of Guelph, David Hussell from the Ontario Ministry of Natural Resources and a team of German researchers led by Franz Bairlein at the Institute of Avian Research, proves that the Northern Wheatear (Oenanthe oenanthe) regularly travels some 29,000 km across ocean and desert. Scaled for body size, this is one of the longest round-trip migratory journeys by any bird in the world.
“They are incredible migratory journeys, particularly for a bird this size,” Norris said. “Think of something smaller than a robin but a little larger than a finch raising young in the Arctic tundra and then a few months later foraging for food in Africa for the winter.”
Until recently, details about songbird migration remained unknown because geo-locators were too big or heavy to attach to such small birds. New smaller devices now allow scientists to track flights over several months and over long distances.
The study found that individual wheatears spend the winter in northern parts of sub-Saharan Africa. Alaskan birds travel about 14,500 km each way, over Siberia and across the Arabian Desert to reach Africa. Birds from the eastern Canadian Arctic cross about 3,500 km of the North Atlantic, land in the United Kingdom, travel southward across Europe, and cross the Mediterranean Sea and the Sahara Desert.
“This is the only known terrestrial bird that physically links the two radically different ecosystems of the Old World and the Arctic regions of the New World,” said Norris.
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