Asian Hornet Nests Increasing in Hessen, Germany
Asian hornets are spreading in Hessen, Germany. Experts are finding more nests of these invasive insects. Controlling them is difficult.
In 2023, 150 nests of Asian hornets were discovered and removed in Hessen, compared to only eight in 2022, according to Reiner Jahn from the Hessian State Office for Nature Conservation, Environment, and Geology (HLNUG). This year, the number of nests has already reached 75, and the HLNUG expects further spread in the Odenwald district and in Central Hessen.
The Asian hornets were first discovered in Hessen in 2019 in the Bergstraße district. They were introduced through imported goods from Southeast Asia and have since been spreading north and eastward. Sightings have also been reported in the Lahn-Dill district and the Waldeck-Frankenberg district.
The appearance of Asian hornets is mandatory to report. Sightings can be reported through the HLNUG’s reporting portal, along with a photo. The more observations are made, the better experts can assess the extent of the species‘ spread and determine if countermeasures are necessary. Reports are continuously monitored and, upon confirmation, forwarded to the relevant Regional Council, which then orders the removal of the nests and insects.
Invasive species like the Asian hornet, which spread in non-native areas, can cause significant damage by displacing native species. They can threaten natural diversity by competing with and displacing local species. Asian hornets feed on other insects, including honey bees and wasps.
The HLNUG is also monitoring the spread of the Asian tiger mosquito, another invasive species. They recently urged cities and municipalities to take targeted action to prevent the settlement and spread of these small, black and white mosquitoes. Citizens are advised to ensure there are no water collections on balconies and terraces, such as in flower pots. Bird baths should be cleaned weekly, and rain barrels should be covered with nets.
In conclusion, the increasing presence of Asian hornet nests in Hessen is a concerning issue that requires proactive monitoring and control measures to prevent further spread and protect local ecosystems. Collaboration between experts, authorities, and the public is essential in managing invasive species and preserving biodiversity.