Sunday, October 07, 2007


The phrase "invasive species" calls to mind a plant or animal being imported from Europe or Asia and running wild in North American habitats. The likes of starlings and garlic mustard cause major problems for our native wildlife and for wildlife managers. Sometimes the invasion works in reverse. One example is the gray squirrel, which was brought to England over a century ago. In this country, they are an occasional pest for homeowners and bird feeders but otherwise harmless; in the United Kingdom, they threaten the native squirrel population.


Read the rest.