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View Diary: The end of the passenger pigeon (33 comments)

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  •  I have to to with the polar bears because their (4+ / 0-)

    existence is so dependent on access to seals via the ice, which is now disappearing.

    I suppose it is question of which would go first, absent human interference the bear or the seals.  Seals trapped on land to reproduce and rest will be easy pray to polar bears that can chase them into costal waters.  If the polar bears over harvest the pups, which they probably will, then both the seals and the bears are doomed, unless the polar bear  turns to other land prey, if it can make the instinctive switch to other pray (which would of course include humans and dogs.)  There are abundant elk and caribou but the bear instinctively goes toward the sea to feed not inland.

    However the seal pups have monitory value and the adult seals have food value to the indigenous people, so they would be likely to kill off the total bear population for their own welfare as well as their safety

    It's a lose lose situation for the bear and at this point likely inevitable and likely will happen in a few years.

    •  Polars now interbreeding with grizzlies. (4+ / 0-)

      Some DNA confirmation, some carcasses.

      A hunter was prosecuted for killing a protected polar bear; his defense was it looked like a grizzly; I believe he was acquitted when it was established as a "pizzly" hybrid.

      "The true strength of our nation comes not from the might of our arms or the scale of our wealth, but from the enduring power of our ideals." - Barack Obama

      by HeyMikey on Sun Sep 01, 2013 at 07:28:59 PM PDT

      [ Parent ]

      •  Indigenous hunters can legally take as many polar (3+ / 0-)

        bears as they want.

        Grizzlies out compete polar bears on land. They are built more solidly and can prey on polars.

        “Conservation… is a positive exercise of skill and insight, not merely a negative exercise of abstinence and caution…” Aldo Leopold

        by ban nock on Mon Sep 02, 2013 at 05:46:46 AM PDT

        [ Parent ]

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