The insect that disappeared in the 1970's has returned to Dalmatia.

A species of wasp thought to have disappeared from Dalmatia since the 1970s has been spotted again in the region, according to biologist Toni Koren, who described the discovery as both surprising and concerning. The insect, known as the oriental wasp (Polistes orientalis), had not been recorded in the area for decades before being found recently near Kaštela, a town in central Dalmatia. Koren, an independent researcher and member of the Hyla association, confirmed the sighting after capturing the wasp in a quarry close to the town. He expressed shock upon identifying the species, noting its striking appearance compared to the more common wasps native to the region. The reappearance of the oriental wasp comes amid growing concerns over invasive species adapting to changing environmental conditions. According to Koren, climate change has led to warmer temperatures, which facilitate the spread of non-native species into new areas. This trend has already affected parts of Croatia, with other invasive species such as the tiger mosquito having established themselves in local ecosystems. The oriental wasp, however, represents a particular concern due to the unpredictable nature of its sting. Koren warned that the wasp's sting, much like that of bees or hornets, can provoke severe allergic reactions in individuals, even if they have previously been stung multiple times without incident. He noted that allergies can develop years after initial exposure, with some people potentially experiencing a reaction even two decades later. While the oriental wasp itself is not inherently aggressive, it becomes defensive when threatened, such as when grabbed, sat on, or pressed against. Despite the potential risks posed by the oriental wasp, there are other, more dangerous species within the same family that have yet to appear in Croatia. One such example is the Asian giant hornet (Vespa mandarinia), which is already present in Italy and poses a serious threat to bee populations. This species targets honeybees at the entrance of hives, capturing them to feed its larvae. In Italy, specialized agencies monitor and control these insects to prevent their spread. Koren emphasized the importance of managing such species should they reach Croatian territory. The presence of the oriental wasp in Dalmatia highlights the broader issue of invasive species becoming increasingly prevalent due to global warming. As temperatures rise, many organisms are expanding their ranges beyond traditional boundaries, often with unintended ecological consequences. Local experts are urging vigilance and further research to understand how these changes might affect biodiversity and human health in the region. Koren’s discovery underscores the need for continued monitoring of insect populations and the potential threats they pose. His work with Hyla involves tracking and documenting such occurrences, providing valuable data for conservation efforts and public awareness campaigns. The return of the oriental wasp serves as a reminder that ecosystems are dynamic and subject to rapid transformation, particularly under the influence of climate change. Scientists and environmentalists remain alert to the possibility of additional species making their way into new territories, requiring ongoing study and adaptive management strategies.