The tiger mosquito is an example of an alien species. This kind of mosquito is common in Asia, but in recent years it has moved to parts o southern Europe. Scientists believe that the eggs of this insect probably arrived inside some car tires that were filled with water. In a few years, the mosquitoes multiplied and spread over large areas of Italy and other countries. Tiger mosquitoes can reproduce faster than the common European mosquito, so they quickly replaced a large percentage of the native mosquitoes.
Though they do not cause serious disease in humans, tiger mosquitoes are a serious nuisance.
They are far more aggressive than common European mosquitoes , and the effects of their bites are worse.