Before revision: Alarm lines Some spiders that do not spin actual trap build alarm webs that the feet of their prey (such as ants) can disturb, cueing the spider to pounce on prey or flee a formidable intruder.
After revision: Alarm lines Some spiders that do not spin actual traps build alarm webs that the feet of their prey (such as ants) can disturb, cueing the spider to pounce on prey or flee a formidable intruder.