Seven different species of mosquitoes were found sharing the natural habitat of Aedes aegypti, during a study of the ecology of this vector in Guaduas, Colombia. Low tanks used for laundry a (albercas) were the breeding places where Aedes aegypti exhibited the greatest degree of association with other species. Larvae of Toxorhynchites spp. were found in elevated water reservoirs. The relevante of these findings for the ecology and control of Aedes aegypti is discussed.