Grey Squirrel (Sciurus carolinensis) in St James's Park of London. This species was introduced from North America and has replaced native Red Squirrel throughout much of the UK.
<a href="//commons.wikimedia.org/wiki/User:Beko" title="User:Beko">Beko</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>