The claim I've heard is that any one (or a few) species of mosquito is not important. There are thousands of species of mosquito and plenty of other biting inse

The claim I've heard is that any one (or a few) species of mosquito is not important. There are thousands of species of mosquito and plenty of other biting insects. A few species are responsible for almost all of the mosquito-borne transmission of deadly human diseases. Eliminating those species should hugely reduce malaria but have little to no impact on wildlife that feed on insects (and you would still get bitten by plenty of insects in the tropics). Tsetse flies and the diseases they transmit have a major effect on keeping livestock in Africa; and hence the ecology and landscape of the affected areas. Removing the burden of diseases transmitted by mosquitoes will probably have indirect effects on a similar scale. Worth it.