Yes, Spiders do sleep but not in the same way as we humans do, they do not have eyelids to close their eyes with so their eyes stay open whilst they are resting. Moreover and more importantly they do not enter REM sleep which is the state that most of the mammals enter. This is the state of deep slumber when we see dreams.
In other words spiders do sleep but not as deeply as we do as they are unable to experience REM sleep
How Do Spiders Sleep?
Spiders do not experience sleep the same way as we do, their state of sleep does not include REM sleep, it is basically just a state where they are resting and aroused only by strong stimulus like the heat of the day or the darkness of night or even perhaps an attack by a predator. This state of sleep in anthropods is called “Tarpor”. An example of this is not only seen in spiders but also in migrating monarchs ( a type of a butterfly ) along with many other little living creatures. Talking about the migrating monarchs’ sleep, their sleep consists of sudden fits of resting while doing long-distance traveling. Another quite important thing to note here is that a lot of arthropods sleep in a different variations of ways. For instance, some anthropods sleep while by sticking to their favorite plants with their jaws
Tarpor also helps antrhopods to adapt the surroundings. For instance, an insect known to live in a rather quite cold climate. And shocking as it may sound, it actually freezes whilst it sleeps at night, and when its day time it wakes up, shoves the ice off of it, and then goes on with his normal daily routine.
Surprisingly, there are also insects like the pillbugs that sleep when they feel threatened which is rather quite odd as this can have them killed at times
that spiders do not take one deep slumber of 4 to 5 hours but rather sleep in small fits of a comparatively smaller time frame usually. Moreover, when in the state of sleep they become less responsive to outer stimulus as any human would and would get startled if anything woke them up just like any humans would. Another important thing to note at this point is that the duration of sleep in spiders can vary quite a lot depending on the environment of a specific species of spiders as well as their overall routine. Spiders in a highly predatory zone tend to sleep less often and for lesser periods of times when compared to spiders with a more calm environment
Do Spiders Dream?
No, dreaming is a state that a mind gets in while in REM sleep and that is a state that is not conventionally found in any species of spiders or in fact any antrhopod for that sake, so this means that though sleeping can be a very important part of many insects, they still do not see dreams. Moreover, another quite important thing to note at this point is that there are quite a lot of insects out there that do not shut down their lids whilst they are sleeping and spiders are one of them as they do not themselves have eyelids
What Happens To The Spider Whilst Sleeping?
The spider enters a lower metabolic state whilst it is sleeping as its body is trying to conserve as much energy as possible so it can do its best whilst hunting when it wakes up. The rate of metabolism whilst sleeping can vary quite a bit for spiders under different surroundings, as spiders in a comparatively cold climate would need to conserve more energy to keep themselves warm and in the right temperature range. Another quite interesting thing to note at this point is that in some conditions spiders have been observed to sleep for days. This has usually been observed for spiders who hunt better at night and live in a warm climate hence want to conserve their energy in the daytime so that they can do their best while hunting in the night
Another thing that has been observed ist that spiders that do not spin webs like the wolf spiders generally tend to sleep elsser then the spiders that do have the ability to spin webs and do do that, as making webs takes quite a lot of energy for a spider no matter what the species of spider you are talking about.
Do Spiders Sleep Upside Down?
Yes, some spiders do sleep upside down but this is not the case with all of them. The spiders that do sleep upside down are usually spiders who are able to spin webs and spend most of their times on it whilst doing things a bit upside down. Things like walking around on the web, catching their prey is all done upside down and they are more comfortable in that position so they don’t mind sleeping in that position too
Hopefully, this article was helpful in answering a few of your insects and sleep-related questions, if you have any further related questions feel free to use the comment section below. Moreover, if you want to know an answer to whether insects seek and take revenge, we have a great article written on just that, you can give that a look “here“. And if you want to go through some interesting facts about insects, natgeokids has a great article written on that, you can give that a look “here“