Question

What North American species have become invasive species or ecological hazards elsewhere?

Answer 1

Eastern gray squirrel

Explanation:

The common eastern gray squirrel which is present is huge numbers in Britain is one which definitely for us Brits gets on our nerves a lot. This is due to the eastern gray eating over seven times the amount that a grey squirrel can, they are also a carrier of squirrel pox which is devastating when the red squirrel contracts it. They were not always a pest with them being brought over for the wealthy and as their owners got bored of them they released them into the wild which they then thrived which then had a knock on effect for the red squirrels which were and are still native to the British Isles.