Arctic mosquitoes are most abundant in the southern and western coastal areas of Greenland, particularly in the fjords and river valleys. These areas experience a relatively warmer climate compared to the northern and eastern parts of the island, allowing for more suitable conditions for mosquito breeding and survival. The presence of abundant freshwater sources, such as melting snow and ice, along with sheltered microhabitats like tall grasses and shrubs, provide ideal breeding grounds for mosquitoes. Additionally, the lower wind speeds in these coastal areas facilitate mosquito dispersal and foraging.