The Asian hornet might be trying to set up a home in the UK.
The species was spotted in the country last month but a nest has only just been discovered in Tetbury, Gloucestershire.
It was found at the top of a 55ft conifer tree, close to the original sightings, with experts studying the shell before destroying it.
They could pose a threat to Britain’s honey bee population so authorities are eager to find them.
Stephen Hirst, the mayor at Tetbury Town Council, said:
‘We would still ask for those people who think that they have seen Asian Hornets from today contact the town council so that we can communicate with the DEFRA task force.
‘They will still be in and around Tetbury for the next two weeks to assure themselves that their work in destroying the hornet nest has been successful and Tetbury’s bee community is now safe.’
The hornet arrived in France in 2004 and is now common across large areas of Europe.
A spokesperson for the Animal and Plant Health Agency added: ‘Inspectors from the National Bee Unit, part of the APHA, are continuing to monitor the area for Asian hornets alongside local beekeepers.’