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Aad van Meerkerk, Wikimedia Commons
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Ireland's 10 Most Unwanted Animals

Invasive species have found their way to the Emerald Isle. Here are 10 of the most destructive.

March 15, 2013
4:45 PM EDT
Alexey Krasavin, Flickr
S. Pothoven, Great Lakes Environmental Research Laboratory/NOAA
Noel Burkhead, USGS
Christian Fischer, Wikimedia Commons
Noel Burkhead, USGS
Mediterranean earthworm | Noel Burkhead, USGS
Ryan Hagerty, USFWS
Robert Orr, Flickr
Muntjac deer | Joe Pell, Flickr