<Tr> <Th_colspan="2"> Diversity </Th> </Tr> <Tr> <Td_colspan="2"> 172 genera, 3122 species </Td> </Tr> <P> Orb - weaver spiders or araneids are members of the spider family Araneidae . They are the most common group of builders of spiral wheel - shaped webs often found in gardens, fields and forests . "Orb" was previously used in English to mean "circular", hence the English name of the group . Araneids have eight similar eyes, hairy or spiny legs, and no stridulating organs . </P> <P> The family is cosmopolitan, including many well - known large or brightly colored garden spiders . With 3122 species in 172 genera worldwide, Araneidae is the third - largest family of spiders (behind Salticidae and Linyphiidae). Araneid webs are constructed in a stereotyped fashion . A framework of nonsticky silk is built up before the spider adds a final spiral of silk covered in sticky droplets . </P>

How many eyes do orb weaver spiders have