Uloboridae, the cribellate orb weavers or hackled orb weavers, is a family of non-venomous spiders. Their lack of venom glands is a secondarily evolved trait. Instead, they kill their prey by crushing with over 140 metres of thread. All members of this family produce a feathery, fuzzy silk called cribellate (or hackled) silk. These spiders do not ...