Jumping Spiders Literally Have Eyes on the Back of Their Heads

Jumping SpidersHyllus jumping spider on a green leaf, showing the detail of the eyes of the spider.

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Spiders that leap also have four more sets of eyes on the carapace for a total of eight eyes in addition to the large, appealing eyes. The arrangement of eyes indicates that the spider has almost no blind spots in its vision. It can thus respond rapidly to danger or prey. It is possible for it to travel from one location to another by sight. The visual range of a jumping spider extends around a foot, which is a long distance for such a tiny animal. Its tremendous vision makes catching leaping spiders difficult because they are hard to kill or locate.