Pests

I was wondering to myself why we need mosquitoes. All I could come up with was that they feed spiders. Then I thought what are spiders for, which would be to feed some spider-eater animals. Then I thought, such animals as birds and other insects that eat spiders probably eat spiders too. So, why do we need mosquitoes? They really do annoy everyone, and can carry diseases. Spiders wouldn't be missed either. Arachnophobia would be non-existent and poisonous spiders would be gone.

Basically, I find no need for mosquitoes, and the loss of spiders is a nice consultation.