Vaduz (ots) -

The Office of Forests, Nature and Agriculture has published the final report on the 2026 mosquito monitoring program. As part of the surveillance, a single egg of the Asian tiger mosquito (*Aedes albopictus*) was detected in an oviposition trap in the Balzers industrial area—a finding previously reported in a press release dated August 21, 2026. This marks the first detection of the tiger mosquito in Liechtenstein since 2019.

Following the discovery, three additional oviposition traps were set up in the Balzers industrial area, and the monitoring period was extended by two inspection rounds. No further Asian tiger mosquito eggs were detected during this time. Larval samples were also collected from a total of five potential breeding sites in the immediate vicinity of the discovery location; no tiger mosquito larvae were found. The results therefore currently point to an isolated incident rather than an established population.

The Asian bush mosquito (*Aedes japonicus*) remains highly prevalent in Liechtenstein's valley region. During the third inspection round of 2026, eggs of this mosquito species were found in approximately 79 percent of the traps. As the season progressed, eggs were detected in fewer and fewer traps. At the same time, the average number of eggs per trap declined significantly.

Monitoring will continue in 2027 with a total of 24 oviposition traps located in the valley region. The final report is available on the national administration's website (www.llv.li) under the "Private Individuals" section, within the "Leisure, Environment & Animal Husbandry" category under "Neobiota."

Media contact:

Office of Forests, Nature and Agriculture 
Oliver Müller, Forest and Landscape Division
T +423 236 64 09
oliver.mueller@llv.li