In 2025, what insect species was captured for the first time in Iceland, previously one of the last places without them?

In October 2025, scientists confirmed a significant ecological event: the first capture of mosquitoes in the wild in Iceland, a nation long considered one of the last mosquito-free places on Earth. This discovery marked a notable shift for the island, which, along with Antarctica, had historically been inhospitable to these insects. The specific species identified was Culiseta annulata, a type of mosquito known for its resilience in colder climates.

For centuries, Iceland's unique and often volatile climate provided a natural barrier against mosquitoes. Unlike other cold regions where water bodies freeze solid for extended periods, Iceland experiences frequent and unpredictable freeze-thaw cycles throughout its winters. This constant fluctuation prevented mosquito larvae from completing their development, effectively acting as nature's pest control. However, the changing global climate, leading to warmer temperatures and milder winters in Iceland, is now making the environment more welcoming for species like Culiseta annulata.

The initial discovery was made by Björn Hjaltason, a local bug enthusiast, who found the specimens using a wine trap—a method typically employed to attract moths. His findings were subsequently confirmed by entomologists at the Natural Science Institute of Iceland. While individual mosquitoes have occasionally been found hitching rides on aircraft, this 2025 event represents the first confirmed establishment of the insects in the Icelandic outdoors. This development raises questions about future ecological impacts and serves as a tangible indicator of how climate change can alter even the most isolated ecosystems.