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Although most species have 4 pairs of eyes, some have 3, 2, 1, or 0 pairs.Spider eyes cannot rotate the way our can, so they can't see anything that their body is not pointing one of their eyes at. So it is better for the spider to have eyes that point in many directions.
so they can see
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∙ 11y ago
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∙ 14y agoTried to answer this from my SL browser, but it crashed, I'll attempt again now.
If you look at this problem from an evolutionary stand point you can get a reasonable answer. A trait, such as blindness, can be selected for if there is:
a) No detriment to being blind (blind Spiders still eat and breed, making blind babies),
b) They have an alternative to sight (helps with point a), and
c) Keeping functioning eyes is more expensive, with regards to energy, than doing away with sight.
Clearly, blind spiders successfully catch prey and breed more spiders... so that means point a is met.
Point b is covered in two ways, the spiders that build webs are usually the ones which are blind... when prey gets caught in the web it is their struggles that attacks the spider to feed. People who keep spiders often have to tickle the web to get them to accept dead food. That takes care of sight for prey, sight against predation is usually not needed as many spiders are toxic, or they wear fake colours claiming to be toxic... to discourage animals from eating them.
To point c, keeping organs working that you never use means you burn energy faster than other similar animals. If there are sister spiders, one who can see and one who is blind... both use webs to catch food and do not NEED their eyes then the blind spider uses less energy to run her body. Meaning if times are lean she'll last longer than her sister whose eyes work. Nature does not support wastefulness.
Other animal population who no longer need visions also go blind. Blind cave fish are a good example of this, it is more energy efficient to be blind in total darkness than to waste energy maintaining useless eyes.
As a side note, not all spiders are blind... it mostly is the ones that live in regions that are generally pitch black like some species of cave spiders. Some spiders have very good eyesight, like the zebra jumping spiders... which also happen to be rather cute with their giant eyes. Most spiders have very poor vision by human standards usually not able to see more than a short distance away from them, but they Can see.
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∙ 14y agoSome species are, but most are not. A few species, notably the family commonly known as jumping spiders, have some of the best vision in all of nature for invertebrates their size.
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∙ 9y agoSpiders see things in low resolution and have poor eyesight. The usually respond to vibrations felt from their webs or the environment around them, or by touch.
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∙ 16y agowell spiders have bad eye sight so they have to have lots of eyes too see well
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∙ 14y agono they are not they need to see to capture food.
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∙ 15y agoThey actually have amazing eye sight almost ten times better then a humans vision.
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∙ 9y agoMost spiders can detect or see only light-dark intensity changes. They rely more on touch, vibration, and taste to navigate their world.
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∙ 11y agoYes/no
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Why can't web spinning spiders catch food by hunting?
A web spinning spider's eyes can't move so, therefore they cannot hunt. There are species of spiders that can hunt because their eyes can move in different directions.
Can spiders talk?
No they can't. Nearly all animals with eyes can blink otherwise their eyeballs would just dry up and they would become blind but as spiders don't have eyelids this means that there is nothing to blink with so they must have some other way to keep their eyes moist.
How many simple eyes do spiders have?
yes they do they have great eyesight'Several families of hunting spiders, such as jumping spiders and wolf spiders, have fair to excellent vision. The main pair of eyes in jumping spiders even see in color. Net-casting spiders have enormous, compound lenses that give a wide field of view and gather available light very efficiently. However, most spiders that lurk on flowers, webs, and other fixed locations waiting for prey tend to have very poor eyesight; instead they possess an extreme sensitivity to vibrations, which aids in prey capture. Vibration sensitive spiders can sense vibrations from such various mediums as the water surface, the soil or their silk threads. Also changes in the air pressure can be detected in the search for prey.
Why do banana spiders shake their web?
That's the way they scare you so you will not come near them or hurt them
How many leg for the spider?
Spiders are arachnids, so they have eight legs.
What is the distance between a spiders eyes?
Spiders occur in a great variety of sizes, and many (if not most) have 8 eyes (four pairs), so your task might be a bit complicated depending on which two eyes you are measuring and on which spider.
Why can't web spinning spiders catch food by hunting?
A web spinning spider's eyes can't move so, therefore they cannot hunt. There are species of spiders that can hunt because their eyes can move in different directions.
Where did you get the name arachnid?
hi my name is Emma. i did a project on spiders recently so i know the answer to the question your asking. the answer is... spiders have 8 legs AND 8 eyes! cool right! you can ask me any question about spiders and I'll answer it!
Can spiders talk?
No they can't. Nearly all animals with eyes can blink otherwise their eyeballs would just dry up and they would become blind but as spiders don't have eyelids this means that there is nothing to blink with so they must have some other way to keep their eyes moist.
Can you combine all species of spiders in the world?
I'm not sure what you mean by "combine," but if you mean to breed different spiders together and get some kind of hybrid that would combine all the characteristics, then the answer is no. For instance, some spiders have no eyes, some have one pair of eyes, some two, some three, and some four pairs of eyes. You would have to make a choice. Suppose that there were 5 species of spiders. Two had 2 eyes, another 4 eyes, another 6 eyes, and one had no eyes. Adding them all together you would have 14/5= 2.8 eyes for the hybrid spider. Some spiders have two claws per foot, and some have three claws on each foot. There is no compromise position between these two basic choices. There are so many different species of spiders that it would take an immense time period just to try to get them to mate. Most of the hybrids probably would not be capable of reproducing among themselves, and much less could they be manipulated to hybridize with other hybrids.
How many simple eyes do spiders have?
yes they do they have great eyesight'Several families of hunting spiders, such as jumping spiders and wolf spiders, have fair to excellent vision. The main pair of eyes in jumping spiders even see in color. Net-casting spiders have enormous, compound lenses that give a wide field of view and gather available light very efficiently. However, most spiders that lurk on flowers, webs, and other fixed locations waiting for prey tend to have very poor eyesight; instead they possess an extreme sensitivity to vibrations, which aids in prey capture. Vibration sensitive spiders can sense vibrations from such various mediums as the water surface, the soil or their silk threads. Also changes in the air pressure can be detected in the search for prey.
Do spiders come in your room if you have a hamster?
Hamsters aren't known to be particularly aggressive creatures, so it's very likely that spiders will continue to come into your room even if you buy a hamster in an attempt to ward them off. If spiders didn't come in your room before you had a hamster, it's unlikely that the presence of a hamster would increase the frequency with which spiders enter said room.
Do spiders see where they are going?
Yes they can becasue they have eyes and they are clour blind so that theyy can see in the dark unlike humans
How does zebra spiders protect themselves?
they have eyes that go completly aroud their head so they have an almost 360 view of everything
Why do spider have 6 eyes?
spiders have 6 eyes because ecologicly 2 milllion years ago a man named salist marnay lived on earth, he was a scientist and put different parts of eyes from 6 different dinasour babys. altogether, i made that up and spiders dont have 6 eyes.
Is all spiders live above ground true?
Not all spiders live over ground, as there are some spiders like the wolf spider that makes a burrow underground and catches bugs that come near. So no not all spiders are over ground.
What type of eyes do daddy long legs have?
Cellar Spiders, as they're called, have two small eyes. They live in caves and other dark places, so sight isn't a problem. They're clumsy when they walk, but on their web, they are by far one of the most strategic and cunning spiders.
