PhysOrg Posted September 2, 2014 Share Posted September 2, 2014 Passerine birds, also known as perching birds, that migrate by night tend to fly faster in spring than they do in autumn to reach their destinations. This seasonal difference in flight speed is especially noticeable among birds that only make short migratory flights, says researcher Cecilia Nilsson of Lund University in Sweden, in Springer's journal Behavioral Ecology and Sociobiology. Read the full article on PhysOrg Link to comment Share on other sites More sharing options...
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