Since a nest was first discovered in Auckland last month, thousands of concerned people have got in touch with Biosecurity New Zealand, with four queen hornet nests found and destroyed so far.
The yellow-legged hornets are very different from honeybees and a far cry worse than our wasps, too.
Hornet-watcher Phil Lester is a professor of ecology and entomology at Victoria University of Wellington.
Photo: Biosecurity NZ