Gray squirrels in the U.K. may soon be given oral birth control medication in an attempt to keep the invasive species at bay, as part of a government plan. Gray squirrels, the common bushy-tailed ...

I started seeing them there a few weeks ago, not recalling them near my cabin feeders before. When they showed up, I also noted that the most common mammal to invade the feeder seemed absent. These ...

The recovery of pine marten in Ireland and Britain is reversing native red squirrel replacement by invasive grey squirrels, according to new research. The recovery of pine marten in Ireland and ...

In the United Kingdom, gray squirrels are an exotic species, first introduced in the 1870s. While the gray squirrel population has grown to an estimated 2.7 million, native red squirrels have declined ...