"Portia" usually needs to inflict up to 15 stabbings to completely immobilise a larger spider(1.5 to 2 times to the "Portia"′s weight), and then "Portia" may wait about 20 to 200 millimetres away for 15 to 30 minutes from seizing the prey.Insects are usually not immobilised so quickly but continue to struggle, sometimes for several minutes.