Ned Rozell's great article about them. He reports that Derek Sikes, the curator of insects at the University of Alaska Fairbanks has calculated that there are about 17 1/2 trillion mosquitoes here every summer, with a combined weight of 96,000,000 pounds. During the summer, counting all of the tourists -- with whom we are happy to share the biters -- all of the humans weigh 442,000,000 pounds. That's plenty of food for the mosquitoes, and they have the caribou, moose, and many other mammals to pester as well. Jim points out that only approximately half of those 96,000,000 are likely to be females (and the literature supports that hypothesis), so we really only have 8 3/4 trillion mosquitoes to worry about.
Grass spider, found in Alaska.
Mr. Rozell suggests that we can cultivate spiders to help keep the population down, but only a couple of tropical spiders prefer mosquitoes. Alaskan spiders might eat them if the mosquitoes happen to fly into a web, but they are not nearly as effective predators as are birds and fish.