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Can flies recognize that I'm holding a flyswatter?
(lemmy.world)
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this post was submitted on 04 Aug 2023
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To me it seems absolutely like it, yes. For whatever reason, Flies are sophisticated nuisance animals, they got all the perks to be effective in that endeavour. If you signal them it's their life or death, it's even more interesting, prime directive is to dance on your nose by then.
Fortunately, they got a few "bugs in their code" which makes them a bit more controllable, I know of a few very interesting ones:
Fear of moving fabric:
Be it a sock or a T-Shirt, once it starts to whirl through the air somewhere near them, they panic. Try and compare, take a solid object (even a fly swatter) or your hand and just whoosh it close by. Often they are back within the blink of an eye, even more annoying now. Try the same with something out of fabric, they will keep 10 times the distance afterwards.
Possible explanation: Their fly brain interpretes it similar to bird wings, a threat even they take serious.
Sleep mode in dim light:
While flies seek out a place to sleep in the light of a single tea candle, you can still see them. Incredibly useful to get rid of flies in small spaces like a caravan or a tent. Possible explanation: They just lack vision, so their only option is to chill at the closest surface.
Fear of crawling into openings:
If a fly wakes you up way before your time, build a little cave in front of your face (Think of the entrance to an Igloo). They won't crawl in for the life of them.
Possible explanation: The ones crawling into the mouth of something often didn't live to pass on their genes.
Water bottle reflection:
How to: Fill a clear bottle with water, close the lid and put it up where they have to see it. I have to admit, I long thought of this as being silly and esoteric Mumbo Jumbo, yet after several attempts at it when Flies became unbearably annoying outside, there are clear differences in their behaviour once you put these up. They will still annoy you from angles where they have no line of view to the bottle, so prepare to set up a few.
Possible explanation: Reflections messing with their vision, esoteric Mumbo Jumbo.
I'd be happy to read some more if you came across something that messes with them, I hate to simply kill or poison them (Don't want fly innards in my living space or poison my surroundings) but to be annoying in revenge is fair game, especially when you get rid of them that way. Btw: how do the salt gun folks deal with the salt being literally everywhere after a shooting spree?
I kill them with a spray bottle filled with 70% isopropyl alcohol. The mist is difficult to avoid, and once they're knocked down, I drown them with a few more blasts. I think the surface tension of the alcohol is able to permeate the tiny holes (spiracles) that would normally keep water out of their respiratory system. No guts, just wipe away the fly's body and any excess alcohol. Anything you miss will simply evaporate. Bonus: 70% isopropyl alcohol is a disinfectant, so you've already helped clean any disease the fly may have been carrying.