My understanding is that, while many species will happily eat mosquitoes, there's no species where mosquitoes are their primary food source. That doesn't mean

My understanding is that, while many species will happily eat mosquitoes, there's no species where mosquitoes are their primary food source. That doesn't mean that eliminating mosquitoes would be consequence-free, of course. It could definitely cause problems for the species who lose a part of their diet, and/or the other prey they eat more of to compensate. But they're not a keystone of the ecosystem like, say, bees are. Also, apparently all of the really dangerous, disease-carrying mosquitoes are invasive.