Mercury linked to dramatic decline of migratory songbirds: study


RCI Radio Canada International
The Cape May warbler, while not named in this story, also migrates from the 
West Indies to the Boreal forests of Canada. A PinP photo.
Examination of tail feathers suggests that mercury is one of the determining factors for the steep declines of many songbird populations that migrate long distances to and from North America. More here.

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