over 1,000 hornets, and just in the last week more than some 4,000 nests like this have been destroyed in china. clearly there’s reason to be on the lookout for things flying around outside, and for camouflaged nests that one might stumble upon.
as a side note, while these hornets don’t have any natural predators, they are actually frequently eaten as a regular food source by people who live near them. so while people are working hard to destroy the hornets and their nests, at least the hornets themselves may be put to some good nutritional use. 