Though they look like giant mosquitoes, they are not mosquitoes. Craneflies do not bite, they do not have a long proboscis (snout) and adults are not known to feed... on anything. Their fragile long legs break easily and may lead some people to think they are a form of giant Daddy-Long Legs (which are not spiders, by the way), but Craneflies have a pair of wings, which are easy enough to see if you get closer.
Adults tend to sit on walls or hang on things (like plants, gutters, soffits, attracted to light. Some species prefer more aquatic habitats, while others are completely terrestrial.
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* MAP NOTES: The territorial heat map above showcases (in red) the states and territories of North America where the Crane Flies may be found (but is not limited to). This sort of data is useful when attempting to see concentrations of particular species across the continent as well as revealing possible migratory patterns over a species' given lifespan. Some insects are naturally confined by environment, weather, mating habits, food resources and the like while others see widespread expansion across most, or all, of North America. States/Territories shown above are a general indicator of areas inhabited by the Crane Flies. Insects generally go where they please, typically driven by diet, environmental changes, and / or mating habits.