Sightings of the invasive species were confirmed in the U.S. in December 2019 and some experts fear they'll spread through the country.
Christian Grasland said he delivered the nest to the municipal building in Brittany to "raise awareness" about the invasive species.
The male murder hornet was the first to be caught in a trap in Washington state.
Researchers also found evidence to suggest wasps had killed a number of other nestlings in the area.
Using carbon extracted from wasp nests, scientists were able to date Australian rock art to a period of sea level rise and social disruption.
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City authorities in Weingarten are running checks for more hornet nests as hikers spend the final days of summer outdoors.
Scientists named them Xenomorphia, after the bloodthirsty, chest-splitting creatures from the Alien movies.
The insect features a trio of spines along its back, like a stegosaurus.
The swarm of wasps sounded like a hailstorm.
The spider can do nothing as it becomes home to the progeny of its own enemy.