Pholcidae
The Pholcidae are a family of araneomorph spiders. The family contains over 1,800 species, including daddy long-legs spiders. Some species of pholcids exhibit a threat response when disturbed by a touch to the web or entangled large prey. The arachnid responds by vibrating rapidly in a gyrating motion in its web. This behavior has led to these spiders sometimes being...