this post was submitted on 08 Feb 2025
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Or is it that the victims pest warning system is currently winning the biological arms race, in which case how are mosquitoes able to successfully reproduce? Or is it that mosquitoes have evolved such that their spawning numbers offset the difficulty they have biting?

Biology is hard.

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[–] [email protected] 140 points 2 weeks ago (4 children)

They have! For the most part you don't even notice mosquitoes biting you until after they're long gone, the part that itches is from the mosquitoes saliva that is left behind! They have evolved to the point that you should never even feel them sticking their proboscis into you so if you actually catch one biting you it's probably because something went wrong or you just happened to see it land

[–] [email protected] 40 points 2 weeks ago (1 children)

If you're aware enough, you can feel one landing on you. Easier to do if you're aware there's one in the room and you try to focus. No real way for them to evolve around that.

[–] [email protected] 32 points 2 weeks ago (3 children)

You only feel the ones that you can feel. The goddamn ninja mosquitoes permeate the air we breathe. They're constantly feeding on us — sapping our life force — and we never even notice.

[–] [email protected] 10 points 2 weeks ago

Well duh. It takes a ninja to sense a ninja. Visit your local dojo to learn more!

[–] [email protected] 4 points 2 weeks ago

They’re more like goddamn vampire mosquitoes, as they drink our blood

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[–] [email protected] 18 points 2 weeks ago (1 children)

Does vary by mosquito species but yeah for the most part.

Alpine mosquitoes with shorter seasons tend to have swarming strategy, they're loud and you notice when they land on you. It's just that there's about 1-200 of them flying about you so lots will still be successful. These ones mostly don't spread disease but they ruin a hike.

The sneakiest ones are in the tropics and are the species that spread malaria and other disease.

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[–] [email protected] 16 points 2 weeks ago (1 children)

If only they evolved to not emit high pitch irritating noise.

[–] [email protected] 5 points 2 weeks ago (2 children)

Honestly, I can see it being a selective trait too. Surely loud mosquitos get detected and killed more often

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[–] [email protected] 4 points 2 weeks ago

It would need to be us that needs to evolve away from being sensitive to mosquito saliva. But our immune system went the other way to be allergic to it so we could defend against any infection or disease the bug might carry. Further proof of human stupidity in our evolution, that we trigger the defense mechanism after the the attack instead of preventing it.

[–] [email protected] 36 points 2 weeks ago

they have. mostly you don't feel the bites until afterwards

[–] [email protected] 30 points 2 weeks ago

They have, the ones that irritate you either make an error or your body has a bad reaction to something in their bite.

[–] [email protected] 24 points 2 weeks ago (1 children)

The mosquito likely evolved to try, but the body evolves to defend just the same. Your irritation is your own body's immune response after all.

[–] [email protected] 4 points 2 weeks ago

Biological arms race

[–] [email protected] 18 points 2 weeks ago (1 children)

Their needle is actually 6 different appendages. Shit is highly evolved

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[–] [email protected] 16 points 2 weeks ago (1 children)

From what I know, when a mosquito stings you, it injects some stuff that prevents the area from hurting, probably so that you wouldn't notice it, but the said stuff also makes the stings super itchy. I'm not completely sure about this though.

[–] [email protected] 7 points 2 weeks ago

Right, you don’t feel the bite. They fly away, and then you start to itch. Most of the time they’re done and give before you notice

[–] [email protected] 14 points 2 weeks ago (7 children)

I hate mosquitoes. I'm one of the people that feel them bite nearly every time, it is painful and the bite they leave behind swells and itches. I've clawed skin off because of how irritating it feels. I'll go outside and they naturally gravitate towards me versus others. Existence is pain.

[–] [email protected] 5 points 2 weeks ago (1 children)

I am the same, blood brother. ✊

[–] [email protected] 4 points 2 weeks ago

Hell yeah ✊

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[–] [email protected] 14 points 2 weeks ago* (last edited 2 weeks ago) (2 children)

You can feel a mosquito feeding on you?

[–] [email protected] 15 points 2 weeks ago* (last edited 2 weeks ago) (1 children)
[–] [email protected] 3 points 2 weeks ago

I did not know there were people who could not feel this 😬

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[–] [email protected] 12 points 2 weeks ago
[–] [email protected] 11 points 2 weeks ago (2 children)

Evolution doesn't work that way. They don't evolve X because of Y. They develop essentially random mutations, and the ones that make them fitter for survival get passed on to their offspring. They don't get to decide that they don't want you to itch and then evolve that ability.

[–] [email protected] 29 points 2 weeks ago

It's a common rhetorical shortcut to anthropomorphize evolution. Doing so doesn't necessarily indicate that the writer doesn't understand how evolution works. It's just cumbersome to repeat an explanation of random mutation and natural selection in every discussion of evolved trait.

Neither creatures nor evolution get to "decide" to develop a trait but, as countless evolutionary arms races show, useful traits and refinements do tend to happen in a way that evokes a sense of conscious decision making.

[–] [email protected] 7 points 2 weeks ago (1 children)

I meant as the ones that have mutations that cause them to itch get whacked, the remaining ones that dont get to pass on this trait to their offspring,creating a generation of itchless bugs, not that this mosquito one day decides to evolve a non itching bite because he thinks it might benefit his bloodline.

[–] [email protected] 9 points 2 weeks ago (4 children)

The itch doesn't begin until well after the female mosquito gets her food and leaves, so what reproductive advantage does it give to that specific mosquito over the others to make the itch not happen at all? The answer is "none".

[–] [email protected] 3 points 2 weeks ago (1 children)

When I start itching from a bite, I'll go on a killing spree and the one that bit me is most likely to meet its demise. But maybe that's just me

[–] [email protected] 5 points 2 weeks ago (1 children)

Animals don't do this, and humans are not the only prey for mosquitos. Also humans live in enclosed spaces which are hard for mosquitos to escape, which is only a few thousands years old, and evolution usually takes more time.

[–] [email protected] 3 points 2 weeks ago

That makes sense

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[–] [email protected] 10 points 2 weeks ago

Most mosquito bites I get I don’t find out about until hours later.

[–] [email protected] 8 points 2 weeks ago

They didn't need to.

[–] [email protected] 7 points 2 weeks ago

If you'd ever been really swarmed by mosquitoes or lived in a place where they are ever present you'd not be asking this question.

  • When they swarm enough they are nearly impossible to avoid.
  • When their presence is constant some people just stop reacting to the bites. I only ever notice mosquito bites on places that get chaffed (like the wrists and hands, around collars and cuffs). If they bite a place you wouldn't normally scratch and can avoid scratching the area after a bite, for some people a welt is much less likely to form.
  • They don't go after only people. Your irritation at a few bites is nothing compared to the diversity in the evolutionary arms race between mosquitoes and their prey.
  • Only the mothers feed on blood. Other mosquito eat mostly plant nectar.
[–] [email protected] 5 points 2 weeks ago (2 children)

Mosquitoes are not a big problem for me, and their bites do not make me itch.

My kid, however.. mosquitoes just swarm him, and the poor thing swells up when he's bitten.

[–] [email protected] 3 points 2 weeks ago (2 children)

I've noticed that too. When out with friends, some people get bitten more than their fair share.

[–] [email protected] 4 points 2 weeks ago (1 children)

It's genetics. We produce some oil or something that mosquitos smell. And some people produce more then others.

Basically bad luck.

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[–] [email protected] 3 points 2 weeks ago (2 children)

It depends on blood type. They prefer O’s and +’s

O+ here and I am the magnet.

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[–] [email protected] 5 points 2 weeks ago* (last edited 2 weeks ago)

If I remember correctly, mosquito mouth/tip is so especially made. That it does not cause any pain when it pokes through the skin. Some scientist even manage to use that to create needles that mimic the same behavior.

[–] [email protected] 3 points 2 weeks ago (4 children)

They do a really shitty job of 'not irritating' your skin. They get it right half the time. The only biological success they've had in evolution is that they are so freaking numerous. Ask a northern Ontarian Indigenous person who grew up in rocky swamps ... you haven't seen mosquitoes until you've breathed in clouds of them.

[–] [email protected] 6 points 2 weeks ago (1 children)

You speak truth.

Hello from the hell-swamps of Louisiana, where it’s Summer for 8-10 months a year and the mosquitos are an omnipresent scourge.

Bonus swarm: termite flights so densely packed that they show up as “weather” on radar.

[–] [email protected] 4 points 2 weeks ago (1 children)

Our summers up here are at their peak in June and July and on hot still windless evenings if you are caught out in the wild, it's torturous. I can't imagine what it would be like down there with a longer hot season. There's a city near here called North Bay where every July the city on the shores of a large lake gets infested with swarms of shad flies, harmless bugs but so thick and numerous that the place ends up smelling like a giant tin of tuna.

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