A concerning development has occurred with the arrival of the yellow-legged hornet ( *Vespa velutina* ) in Poland, and the first nest has been discovered. This marks the first confirmed establishment of this invasive species within Polish territory. The yellow-legged hornet, originating from Asia, poses a threat to native bee populations and ecosystems. Experts are monitoring the situation closely to assess the extent of the invasion and implement control measures. The discovery of the nest indicates the hornet is already reproducing in Poland, raising concerns about its potential spread. Authorities are urging the public to report any sightings of the yellow-legged hornet to help track and manage the invasive species.