Twice a year, billions of birds travel thousands of miles around the world to breed and escape winter. But these flyway routes are under threat from human activity, habitat loss and climate change. A $3 billion conservation plan may be their only hope.
Credit: Ding Li YongBar-tailed godwit numbers are decreasing
Scientists still puzzle over their sense of direction, suggesting they use a combination of stars, landforms, smells and the Earth’s magnetic field to get from A to B. This time, they cross over Asia, allowing themselves a month-long stop around the Yellow Sea. One popular site is the Yalu Jiang Nature Reserve in China.But even this is not on the scale it used to be. David Melville, ornithologist and co-author of a 2018 report on shorebirds in the Yellow Sea, says that since 2013, food stocks have crashed at Yalu Jiang and the number of bar-tailed godwits has declined dramatically.
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