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MApping migration

Mapping Migrations

Sometime this winter, waterfowl experts from across Canada will gather for their annual "wing bee." Their task will be to sort through a small mountain of duck wings obtained from a randomly selected group of hunters, and assign the wings to piles by species, age and sex. Together with statistics from similar shindigs held in the United States, this information will provide a picture of the year's kill and will also offer hints about the ups and downs of duck populations. That may seem like a lot to learn from a heap of dried-up remains but, to Len Wassenaar of the National Water Research Institute in Saskatoon, a room full of duck wings is like an archive that can be studied for clues about each bird's life history and movements. Wassenaar and his colleague Keith Hobson of the Canadian Wildlife Service have developed a technique for reading a feather's chemistry and tracing it onto a map. The story begins with rain, which always contains a m...

Posted by: Gabrielle Gooch

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