Probably because there are about 100 trillion mosquitoes in the world. Plus they are tiny.

It is not of course the mosquito directly, but the things they carry. So you only have to reduce the mosquito population to the point where the things they carry, can not find enough hosts and vectors, for a short while, to send the diseases extinct.

@Charles1971 Did you not hear about the method? They made male mosquitoes that only produce male offspring. Those offspring, in turn, only produce male offspring. If we release enough of them, over time they'd likely kill off all the mosquitoes. If I had the capability, that's all I'd do for the rest of my life... unless I took some time off to kill all the wasps.

The mosquitoes in Hawaii that carry avian malaria are killing the endangered birds in the forest, so there is currently a mitigation trial underway by releasing some sterile male mosquitoes to mate with the females, thereby reducing the number of mosquitoes. We're hoping this trial might work to reset the mosquito population in the fragile forest, so that the birds can survive (to eat more bugs!)

Sometimes the mosquito is the food, and sometimes I'm food for the mosquito! I wish they would release the sterile mosquitoes at a particular waterfall I use for weddings. Summertime has me scratching bites all the way home. Sadly it's not one of the test sites.

We are close, but of course they are only including murder, if you included war and manslaughter, then we are probably top.

@Fernapple Now, that makes more sense.

@Fernapple Mosquitoes form an important source of biomass in the food chain—serving as food for fish as larvae and for birds, bats and frogs as adult flies—and some species are important pollinators.
Every living thing has a role even the annoying ones.

@Betty Having a role doesn't mean they're vital. They estimate 100-150 species of plant and animal go extinct every day and the world's still spinning so to speak.

@ChestRockfield And new ones appear.