On a volcanic slope near Kjós, Iceland, scientists found three ringed mosquitoes in October 2025 — the first ever recorded on the island.
Why Iceland’s mosquito-free status is ending
For centuries, Iceland’s harsh climate and isolation kept it free of biting insects, a fact that shaped its ecology and human settlement. But rising Arctic temperatures, now increasing four times faster than the global average, are allowing species like Culiseta annulata to survive where they once could not. The discovery was confirmed by the Icelandic Institute of Natural History, which noted the insects may not yet be established but could persist under current conditions.
What the spread means for Arctic ecosystems
The arrival of mosquitoes and other arthropods disrupts finely tuned seasonal rhythms. If insect peaks occur before migratory birds hatch their chicks, food shortages could follow. Reindeer already face increased blood loss and energy drain from bites, potentially lowering survival and reproduction rates. These shifts are not isolated; they reflect a broader reorganization of Arctic life as warming opens the door to southern species.
How researchers are responding to the threat
The study’s authors, Amanda Koltz of the University of Texas and Lauren E. Culler of Dartmouth College, urge better coordination across borders to monitor insect movements in the Arctic. They argue that tracking species like mosquitoes offers an early warning system for ecological change. Their findings appear in the journal Science, highlighting the demand for integrated observation networks as the region transforms.
Could mosquitoes become established in Iceland?
It is uncertain whether the species will survive Icelandic winters long-term, but evidence suggests it can endure current conditions.
Why are Arctic insects a concern beyond annoyance?
They affect wildlife nutrition and energy balance, with cascading effects on reproduction and survival in species like birds and reindeer.
