However, they have been introduced to other parts of the world, including:
* Great Britain: They were introduced in the 19th century and are now widespread throughout the UK.
* Ireland: Introduced in the 1870s, they are now common throughout the country.
* Italy: They are found in certain regions, particularly in the north.
* South Africa: They were introduced in the 1930s and are now established in various areas.
* Australia: They are found in small, isolated populations.
It's important to note that brown squirrels are considered an invasive species in some regions, as they compete with native wildlife and can cause damage to ecosystems.