"Portia" species can make detours to find the best attack angle against dangerous prey, even when the best detour takes a "Portia" out of visual contact with the prey, and sometimes the planned route leads to abseiling down a silk thread and biting the prey from behind. Such detours may take up to an hour, and a "Portia" usually picks the best route even if it needs to walk past an incorrect route. If a "Portia" makes a mistake while hunting another spider, it may itself be killed.