Spiders can hunt with nets

The net-casting spider hunts using a rectangular web attached to its front four legs. It hangs upside-down from trees and other vegetation, using thin lines of silk to support itself. It then takes aim by dropping a ‘target’ of white faeces on the floor; when an insect steps on the target, the spider pushes the stretched net downwards to entangle it. As the fibres in the net relax, the insect becomes trapped. It can even use this incredible hunting technique to catch flying insects, swinging the silk upwards into the path of its prey.