|MadSci Network: Zoology|
Actually, most spiders have poor eyesight even in daytime. They depend on other senses, especially tactile (touch)or chemical receptors. Of the nocturnal hunters only some wolf spiders (Lycosidae) and ogre-faced spiders (Deinopidae) have good eyesight that may function in the dark, probably under star or moon light. Most jumping spiders (Salticidae), which have the best eyes found in spiders, cannot locate prey at night at all. The few that can apparently use tactile or chemical clues instead of eyesight.
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