 The hunting tactics of Portia are versatile and adaptable . All members of Portia have instinctive hunting tactics for their most common prey , but can improvise by trial and error against unfamiliar prey or in unfamiliar situations , and then remember the new approach . There are differences in the hunting tactics of the regional populations of P. fimbriata . Those in Australia 's Northern Territory are poor at hunting jumping spiders and better against non @-@ salticid web @-@ building spiders and against insects . The Sri Lanka variant is fair against other jumping spiders , and good against web spiders and insects . P. fimbriata in Queensland is an outstanding predator of other jumping spiders and of web spiders , but poor against insects . The Queensland variant use a unique " cryptic stalking " technique which prevents most jumping spider prey from identifying this P. fimbriata as a predator , or even as an animal at all . Some jumping spider prey have partial defences against the cryptic stalking technique . All types of prey spiders occasionally counter @-@ attack , but all Portia species have very good defences , starting with especially tough skin . 
