It was only because the same thing was going on with me that I understood what was happening with a coyote, barely visible up on the horizon at twilight. The photos are not too good because of the great distance and dark hour. I myself was contending with swarms of mosquitos, and they were winning. I looked up to see this coyote engaged in its own mosquito battle: the coyote was repeatedly snapping at them, batting them with a paw, shaking itself, rubbing its face and twitching its ears. The final remedy that worked was to get up and move on: it worked for me. It probably worked for this coyote!