Mosquitoes are eaten by animals such as bats, and without them those animals might come extinct. They also can clean pollution out of water as a baby. Get more info at Google search what good do mosquitoes do to us? Hope you liked my answer.
The annoying itching takes your mind off of the more important things that you should be thinking of.
I would guess so. But, since it was in the middle of a lake, you have to take in mosquitoes and things.
a lot of things
Ptarmigans only eat plants, so their food can't eat mosquitoes!
No, they are consumers. Decomposers break down dead material. Mosquitoes feed off other living things.
Only if they are not black.
Clouds, sky, mosquitoes 
When they take your blood they could be taking a virus. The male and female are both nectar feeders. Maybe like bees they make more things grow.
That is a good question! Mosquitoes do not die from the diseases they carry. Otherwise the would not get chance to transmit the diseases they carry.
Well, they spread malaria, that's pretty bad.
Mosquitos are blood sucking bugs and are pesky little things.
they produce many things, like disease. Yes, they are producers