Live data from Hacker News

Why flying insects gather at artificial light

nature.com

151–160 of 183 posts

Re: Why flying insects gather at artificial light

#151

One fun thing to do with a swarm of bug near a light is to take out your keys and shake them. Keys will often ring in the ultrasonic and poorly mimic the frequencies that a lot of bats use. If you have a population of bats that hunt near you, the bugs will typically just drop. Like, just drop to the ground as fast as they can. They know the sound of hunting bats and your keys may be just close enough to that sound th…

Have you ever done that?

Re: Why flying insects gather at artificial light

#152

Earlier quoted context omitted.

or superpowers

Wrong, Batman had no superpowers. He was just good at martial arts, and had access to some nice equipment (because he was a billionaire).

He had superhuman thirst for justice

Re: Why flying insects gather at artificial light

#153
post #9

I had a really weird observation. Do you know how in the summer flies tend to enter rooms and circle the middle of it (where usually the turned off light fixture is)? And they seemingly can't or don't want to find open window to leave the room? At one point for unrelated reasons I replaced light fixture in my room with more than 200W worth of strongest E27 Philips LED lightbulbs I could find (20*1521lumen). Few flies…

This actually squares with the study, no? I mean, when they are inside - and it's my experience as well - they might take the window as the main source of light and think that's the sky, so they start to fly in circles.

The observable effect is true, but I don't think it squares. Circles below the ceiling in the middle of the room aren't perpendicular to the window as a light source.

I see this mostly with one particular type of fly that just loves going around light fixtures, maybe they're sensitive to the EM spectrum rather than visible light?

Re: Why flying insects gather at artificial light

#154
post #130
post #115

Earlier quoted context omitted.

Interesting, I heard a story once that you can catch bats with keys: Put a bunch of keys in a sock and throw that in the air. If there is a bat near enough it might dive for and grab the object, then it gets drawn to the ground because the keys are too heavy. There you can catch it if you are quick. Might be an urban myth, though it seems like it might just work.

Note that depending on your area this might be illegal. In France for example, bats are a protected species and it’s forbidden to kill or capture them.

Who in the world would know anything about it if you're out at night catching bats with a sock?

Re: Why flying insects gather at artificial light

#156

One fun thing to do with a swarm of bug near a light is to take out your keys and shake them. Keys will often ring in the ultrasonic and poorly mimic the frequencies that a lot of bats use. If you have a population of bats that hunt near you, the bugs will typically just drop. Like, just drop to the ground as fast as they can. They know the sound of hunting bats and your keys may be just close enough to that sound th…

This is also hilarious too: https://www.reddit.com/r/nextfuckinglevel/comments/17jw3gm/d...

Re: Why flying insects gather at artificial light

#157
Read a bit of it and it does make sense I guess! Looking it up it seems as though insects generally don't have the fancy ear/inner ear that we have as humans seems to sense gravity and velocity through inner ear and pressure against our skin (across our whole body).

Considering that insects don't have our fancy inner ear and can sense touch/pressure on a surface but cannot use this in flight, I guess it does make sense that they'd need some other way to orientate themselves; why grow another organ/sense when eyes already do the job! (Until humans come along and ruin it by discovering fire).

Re: Why flying insects gather at artificial light

#158
post #130

Earlier quoted context omitted.

Note that depending on your area this might be illegal. In France for example, bats are a protected species and it’s forbidden to kill or capture them.

Also depending on your area, there's a chance the bat may scratch you without you realizing it, and a few months or years later, you suddenly go mad and die in agony. At least I'm more scared of rabies than any government fine. By the time you know something is wrong, you're already a corpse that's about to remember to stop moving.

Rabies can lay that dormant? And there’s no test?

Re: Why flying insects gather at artificial light

#160

Earlier quoted context omitted.

Wrong, Batman had no superpowers. He was just good at martial arts, and had access to some nice equipment (because he was a billionaire).

So the costume was basically just a kink?

The underwear worn outside of the pants are a dead giveaway.
Post reply on HN