Each year shorebirds from North and South America migrate thousands
of miles to spend the summer in the Arctic. There they feed in
shoreline marshes and estuaries along some of the most productive
and pristine coasts anywhere. With so much available food they are
able to reproduce almost explosively; and as winter approaches,
they retreat south along with their offspring, to return to the
Arctic the following spring. This remarkable pattern of movement
and activity has been the object of intensive study by an
international team of ornithologists who have spent a decade
counting, surveying, and observing these shorebirds. In this
important synthetic work, they address multiple questions about
these migratory bird populations. How many birds occupy Arctic
ecosystems each summer? How long do visiting shorebirds linger
before heading south? How fecund are these birds? Where exactly do
they migrate and where exactly do they return? Are their
populations growing or shrinking? The results of this study are
crucial for better understanding how environmental policies will
influence Arctic habitats as well as the far-ranging winter
habitats used by migratory shorebirds.
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