How Many Eyes Do Most Spiders Have
But how many eyes the spider has is a separate issue.
How many eyes do most spiders have. The majority of spiders about 99 percent have eight eyes. Spiders can have two eyes like most other creatures or a grand total of eight eyes. Even within a single species the number of eyes may vary but it s always an even number. In fact most spiders have 8 eyes.
Spider eyes are more like human eyes than the compound eyes of other insects. A few spiders have six four two or even no eye by any stretch of the imagination. Even within a single species the number of eyes may vary but it s always an even number. However spider species in the family of in fact most spiders have 8 eyes.
The life span of these creatures reaches 30 years and it must be said that most of them do not die from natural causes. However spider species in the family of caponiidae have only 2 eyes which is an unusual occurrence among spiders. Some spiders however have six four two or even no eyes at all. It s thought that the first two are descended from the early simple eyes of arachnid ancestors but that the others came from the splitting up of ancestral compound eyes.
Most of the spiders about ninety nine percent have eight eyes. To date there are about 42 000 species of spiders that live now more than one thousand fossil species and new ones are. The arrangement of a spider s eyes can be helpful in identifying what family it belongs to. Most spiders have eight eyes but some species have six four two or even no eyes.
The smallest spider has a size of no more than 0 5 mm and the largest one reaches almost 30 cm.