Utah State University Extension
Crane flies belong to one of the most specious families of flies. The adult flies, also known as “mosquito hawks”, are not giant mosquitoes and do not bite, and though the name suggests it, they do not feed on mosquitoes. In general, the larvae are associated with aquatic and semi-aquatic habitats. The majority of crane flies are not pests.
Ramirez, Ricardo and Kopp, Kelly, "Common Crane Fly in Turf" (2015). All Current Publications. Paper 883.