The North American gray squirrel was introduced to Britain in the 19th century, and today it has become one of the country’s most successful invasive species. Larger and more adaptable than the native ...

Squirrels can transform from charming backyard visitors into persistent garden pests when they start digging up bulbs, ...

Source: Charles J. Sharp, via Wikimedia Commons. Distributed under a CC BY-SA 4.0 license. Eastern gray squirrels (Sciurus carolinensis) listen in to birds’ conversations for cues about nearby ...