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South Africa PDF Print E-mail
Written by globalbirdtrekkers.org   
Thursday, 17 April 2008

Thousands of swallows die in a short cold spell just before departure on their annual migration north. The exact cause is as yet unknown, but it is speculated that the cold weather prevented them from feeding and was exacerbated by energy use in an attempt to maintain body temperatures in the cold. South African Birdnet, April 2008

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