There are over 400 North American species of funnel weaver spiders in the genus Agelenopsis, commonly called grass spiders after their preferred habitat. They spin sheet webs of nonsticky silk with a characteristic funnel extending off to one side. The funnel is where the spider hides while awaiting prey. When something blunders onto the web, the spider quickly attacks and immobilizes the unfortunate creature, then drags it into its silken retreat where it can dine unmolested. These sheet webs are nearly invisible unless covered with dewdrops on a cool morning.