Asian hornets have characteristic yellow legs, which is why it is often called the yellow-legged hornet.
They are not dangerous to humans, unless you have an allergy to their sting, and are not generally aggressive.
However, they are threatening to current ecosystems within the UK, particularly to beloved bees who are vital in the life-cycle of a plant, due to pollination.
This process is essential because it allows plants to reproduce, and many plants depend on bees or other pollinators to survive.
Much has been made of saving bees in recent years, with experts warning ecosystems could collapse if bees continue to decline.