The Aedes Aegypi mosquito is one of two found in tropical climate countries which is capable of carrying the Zika virus. It is not native to the United States but has been found in 12 of California’s 58 counties. The mosquitoes are transported into this country by visitors and residents. - The Aedes Aegypi mosquito is one of two found in tropical climate countries which is capable of carrying the Zika virus. It is not native to the United States but has been found in 12 of California’s 58 counties. The mosquitoes are transported into this country by visitors and residents.