{"id":327871,"date":"2025-12-04T19:56:08","date_gmt":"2025-12-04T19:56:08","guid":{"rendered":"https:\/\/www.newsbeep.com\/au\/327871\/"},"modified":"2025-12-04T19:56:08","modified_gmt":"2025-12-04T19:56:08","slug":"why-do-spiders-have-8-eyes","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/au\/327871\/","title":{"rendered":"Why do spiders have 8 eyes?"},"content":{"rendered":"<p>Though a few spiders have six eyes, the default number is eight, usually arranged in two approximate rows, says Richard Jones.<\/p>\n<p>Scorpions also have multiple eyes (6-12), but they are less obvious because they are smaller. It seems likely that the original proto-arthropod probably had two eyes (as did the extinct trilobites and giant sea scorpions), and this pair has been maintained in crustaceans (such as woodlice), millipedes and insects.<\/p>\n<p>But as <a href=\"https:\/\/www.discoverwildlife.com\/animal-facts\/insects-invertebrates\/arachnids-guide\" rel=\"nofollow noopener\" target=\"_blank\">arachnid<\/a> ancestors evolved, the eyes split into a front portion and a side portion, and then split again.<\/p>\n<p><a href=\"https:\/\/www.discoverwildlife.com\/animal-facts\/how-what-do-animals-see\" rel=\"nofollow noopener\" target=\"_blank\">What and how do animals see? Mysteries of animal vision explained<\/a><\/p>\n<p>Spiders then evolved so that rather than the multiple lens facets shown in insect compound eyes, a spider eye is a single lens with multiple receptors beneath for far better resolution of the final visual image.<\/p>\n","protected":false},"excerpt":{"rendered":"Though a few spiders have six eyes, the default number is eight, usually arranged in two approximate rows,&hellip;\n","protected":false},"author":2,"featured_media":327872,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[64,63,128,338],"class_list":{"0":"post-327871","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-wildlife","8":"tag-au","9":"tag-australia","10":"tag-science","11":"tag-wildlife"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/posts\/327871","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/comments?post=327871"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/posts\/327871\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/media\/327872"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/media?parent=327871"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/categories?post=327871"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/tags?post=327871"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}