This video from the USA says about itself:
10 June 2017
Huge Mosquitoes – no these are harmless Crane Flies, very large and look like mosquitoes, but are not! Sometimes called Mosquito Hawks or Skeeter Eaters as they are rumored to eat mosquitoes, but they don’t consume mosquitoes at all, in fact they pretty much don’t eat anything during their short lives, their main goal is to mate as we see here – and it is a slow process. It does get a little exciting at a few points along the way. Filmed near the Great Smoky Mountains; these unusually large members of the Crane Fly family are of more than 500 varieties in these parts.