Every year around July, large flocks of Eastern Curlews leave their breeding grounds in the Arctic and embark on a perilous 10,000 kilometre journey to the coast of Australia. The birds cannot swim; if they become exhausted and fall into the ocean, they die. But it's a journey they have made for tens of thousands of years, tracing invisible flyways in the sky in what is one of the most spectacular mass migrations in the animal kingdom. Following...
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Nature