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Red Knot (Calidris Canutus), Porsanger, Norway
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Uploaded on Thursday 10 Feb 2011 by Peter Prokosch

Red Knot (Calidris Canutus), Porsanger, Norway

Year: 2010 Taken by: Peter Prokosch
The shorebird migration season is defined by the weather. Birds fly just behind the 35°F isotherm line, meaning that as they fly, they stay within a particular temperature range throughout the journey, effectively following the weather. This explains why peak migration dates may vary from year to year and emphasizes that shorebirds are affected by the weather.
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