European Hornet Vespa crabro

Europe's heavyweight hornet is a master architect, building intricate papery nests from shredded plant fibers—a remarkable feat using pre-chewed wood pulp as construction material. Originally confined to Europe, they traveled unwittingly to North America and Canada as early as 1840 and are now firmly established. What's particularly fascinating is their unique worker-policing system: rather than relying on the queen's chemical commands to control reproduction, workers actively police each other, preventing nestmates from laying eggs through social pressure instead of chemical control.