 When not hunting for prey or a mate , Portia species adopt a special posture , called the " cryptic rest posture " , pulling their legs in close to the body and their palps back beside the chelicerae ( " jaws " ) , which obscures the outlines of these appendages . When walking , all Portia species have a slow , " choppy " gait that preserves their concealment : pausing often and at irregular intervals ; waving their legs continuously and their palps jerkily up and down ; and moving each appendage out of time with the others : 6 and continuously varying the speed and timing . : 418 Portia ′ s walk is unlike that of any other spider , and this gait and the spider 's fringes gives the appearance of light flickering through the forest canopy and reflecting from a piece of detritus . : 6 In Queensland , P. fimbriata walks and waves more jerkily and about twice as slowly as other Portia species , including P. fimbriata in other areas . : 433 
