With the United States containing so many world-Â­famous tourist destinations and being home to three giants of the aviation industry (US Airlines, American Airways, and Delta Air Lines), it's no surprise that the country's airports rank among the busiest in the world, weaving a complex network of routes all over the globe.
Birds, bats and other animals can be used as one of mosquito control methods, but alone they certainly wonât make a visible impact on the population of mosquitoes. Some species of birds like purple martin eat mosquitoes and these insects take few percent of their daily meal and bats, who are night hunters also feed from mosquitoes.
They are streamlined in form, with relatively long, pointed wings and small feet, and, with the exceptions noted below, average between five and six inches in length. Snakes, hawks, and owls appear to be their major natural predators. All swallows are protected by federal and state law. Descriptions that follow are for adult birds. The purple martin (Progne subis), the state's largest (about eight inches long) swallow, is probably the species best known to most city and suburban dwellers. This is the only United States swallow whose sexes differ markedly in appearance; males are shiny blue-black both top and bottom, and females and immatures have light breasts and bellies.