In almost every country, mosquitoes are a threat, with the exception of Iceland. At present, the only place in Iceland where mosquitoes can be found is the Icelandic Institute of Natural History.
There, a solitary mosquito specimen was kept in a can of alcohol. The mosquito was discovered in the 1980s when a passenger boarded a flight from Greenland at an Icelandic airport.
There are no mosquitoes in Iceland, not because of the cold, nor because Iceland does not have small breeding grounds such as small ponds. Some scientists say that the most credible conjecture currently put forward is that Iceland usually has three major cold and warm periods each year. This cold and warm alternating too frequently weather may be too unstable for mosquito survival.
In addition, some people think that there may be some chemicals in the soil and water in Iceland that make mosquitoes intolerable.