I’m being bled dry, I need to know
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They are effected by fans, infact in high mosquitoe areas alot of people will just put oscillating fans on their porches to blow them all back until they give up.
They very much are. But compared to the average speed of airstreams we normally encounter, like ceiling fans or heating vents, they can fly quite a bit faster than that so they just do their own thing, albeit a little slower in one direction than another.
If they get right into the core of a fast airstream, like a desk fan or hair dryer, they’ll get blown around, but those high speed air jets dissipate pretty quickly.
If you get them outside in the wind, they’re screwed. They have to seek calm air…that usually means behind things or close to the ground.
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As other posters pointed out, small, airborne insects are impacted by breezes, fans, etc. However, people can’t really identify the patterns of the insects trying to compensate for counter-drafts . (This is as five-year old without going into physics and insect biology/physiology
insects have incredibly fast reaction times. So even rapid changes in wind direction are pretty easy for them to react to.
If the fan is sufficiently strong they are definitely affected. In fact it is what out-door restaurants use as a repellant in many countries: just have a fan turned on high blowing under your table so the mosquitos don’t bite your legs
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