Siberian swans signal start of Arctic winter
The birds fly 2,500 miles from Russia each year to escape the freezing winds blowing behind them. According to folklore, their early arrival signals the start of a long, harsh winter.
Last year, the first swans landed two weeks later but in much larger numbers, marking the start of the coldest winter for 31 years.
Link:
http://www.telegraph.co.uk/topics/weather/8071553/Siberian-swans-signal-start-of-Arctic-winter.html
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