I’ve had to deal with huge swarms of these things every summer for the few years I’ve lived a mile away from a lake. I assumed they were mosquitoes until recently.
Is it some kind of midge fly? How can you tell? If I were to make an uneducated guess, I’d say it’s not a mosquito because there’s not a straight proboscis.
Scale would be helpful, but likely not a mosquito. Unless you have some decent macro setting or lens for your camera.