The Question: In the United Kingdom, the greatest threat to the native red squirrel, like this one, is the…
A Pine marten
C Gray squirrel
Millions of North American gray squirrels thrive in the UK after they were introduced in the 19th century. Aside from outcompeting red squirrels for food and habitat, gray squirrels spread diseases, like squirrel pox, to the native squirrel population. The situation is so dire for the red squirrel that it’s against the law in the UK to release a captured gray squirrel back into the wild.
The correct answer is Gray squirrel.