European hornets have distinct looks, depending on their role in the central hive. Workers — the most common type seen flying around outside — grow to be about an inch to an inch-and-a-half long.

The hornets can often be mistaken for other insects like yellow jackets, however, European hornets are larger by comparison and primarily yellow, black and red.

True European hornets are woodland insects. They build nests inside hollow trees, usually about 6 feet above ground or higher, but sometimes in barns, sheds, or walls of a house or attic.

According to insect experts at the two organisations, nature can be canny: what you think is a hornet may be a hoverfly ...

The European Hornet has a stinger, which can grow up to an inch and a half long but experts say the insect is not aggressive. WPIX New York City, NY. Large European Hornets spotted on Staten Island.

Talking about the European hornet's nest at Fern Valley, he said the nest had been "gradually growing in size", adding the non-invasive species were having a "strong year".

Talking about the European hornet's nest at Fern Valley, he said the nest had been "gradually growing in size", adding the non-invasive species were having a "strong year".