Many invertebrates, as well as birds and bats, consume mozzies. Small fish and insect larvae in bodies of fresh water also consume their larvae ("wrigglers" this end). If you kill them all you are seriously disrupting ecosystems and unintended consequences will occur. In May, a beech tree next to our washing line became infested with beech woolly aphids, big time. Honeydew all over the nice clean sheets. I had to relocate the washing line. I could have sprayed the tree with insecticide, of course, which would have killed far more than just the woolly aphids. Instead, ladybird and other beetle larvae have done the job for me, all for free. I shall be putting the washing line back in the next couple of days. That the way it should be. Rub DEET on your bare bits and you won't get bitten.