Eastern gray squirrel

The grey squirrel is a bushy-tailed tree climber originally from eastern North America. These nimble rodents play a key role in spreading tree seeds through forests. Though common at home, they've become problematic invaders in places like Europe where they don't belong.

• Helps forests grow by burying and forgetting tree seeds
• Considered an invasive species in parts of Europe
• Spends most of its life climbing and leaping between trees