Are daddy long legs mosquitoes

No. Daddy long legs are not mosquitoes. Daddy long legs are arachnids (Spiders) and although they are in fact quite poisenous, daddy long legs are harmless because their mouths are too small to bite. Daddy longlegs are not mosquitos, neither are they arachnids (spider) they are actually called Crane Flies, they are not poisonous. Their young, which live in the soil and feed on the roots of grasses and plants are called Leather Jackets.