Zika virus, like other flaviviruses, is transmitted by mosquitoes, primarily of the Aedes (Stegomyia) genus. Several Aedes spp. have been implicated, including Ae. aegypti, Ae. africanus, Ae. hensilli, and Ae. albopictus (1,21–23). The Ae. aegypti mosquito appears to be the major vector in Asia (24) and was the suspected primary vector for the French Polynesia outbreak (25). Zika virus has been detected in wild-caught Ae. aegypti mosquitoes, which laboratory experiments have shown to be capable of transmitting Zika virus (26,27). Ae. hensilli mosquitoes were implicated in the Yap outbreak, yet Zika virus has never been isolated from these mosquitoes (28,29). In Africa, the predominant Aedes species vector has not been definitively identified, although viral isolation studies suggest that Ae. albopticus was the likely vector in a 2007 Zika virus outbreak in Gabon (23).