in the jungle theres a lot more natural predators culling mosquito populations at all stages of life, while in sub arctic siberia the mosquitos hibernate, then all lay eggs at once and dont have a lot of natural predators in any of their life stages until the electric lamp apex predator dunks on them.   but honestly, how are there not entire businesses based around exterminating mosquitos in these places? i'd have a row of mosquito lamps on every building.
Austria