@JeffGu in the fall or winter maybe but we got some serious mosquitos, gnats, ticks, and chiggers. honestly though, the ground guys are the ones that complain when I'm 20' and higher. i think mosquitos don't go over 20 or so.
Around here I've noticed that if there's even a light breeze, they stay down low. But if it gets toward dusk, and the wind dies down to nothing, the bastards will go 80' up for that blood buffet!