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  1. Jaysan

    Could migration routes be traced back to where birds evolved in ancient times?

    Thank you. Stuff to read around.
  2. Jaysan

    Could migration routes be traced back to where birds evolved in ancient times?

    Thanks for the detailed reply. Need to digest before I comment. Just about the Kirtland's warbler. I'm reading "A world on the wing" by Scott Weidensaul where he mentions that it's not just Jack pine forests but large areas of new growth of Jack pines that are critical for its nesting. He...
  3. Jaysan

    Could migration routes be traced back to where birds evolved in ancient times?

    I was probably unclear. North-South, in the northern hemisphere. So, the reverse in the Southern hemisphere. Essentially, warmer closer to the equator. Altitudinal migration - probably works in the same way, higher colder, lower warmer.
  4. Jaysan

    Could migration routes be traced back to where birds evolved in ancient times?

    Hello, penny for your thoughts. Migration is generally North-South. One that's traditionally explained be temperature and availability of food. However, there are some birds like the Amur falcon which migrate East-West too, which doesn't make sense. I wonder if the place a bird migrates to has...
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