Pred ators ▁attract ▁their ▁pre y ▁by ▁moving ▁their ▁ca ud al ▁section ▁in ▁a ▁way ▁that ▁m im ics ▁the ▁victim ' s ▁own ▁pre y . ▁The ▁pre y ▁is ▁intr igu ed ▁by ▁ca ud al ▁behavior ▁and ▁will ▁investigate ▁assuming ▁it ▁is ▁their ▁own ▁pre y . ▁ ▁Species ▁ ▁Sn akes ▁▁ ▁Ca ud al ▁l uring ▁behavior ▁is ▁found ▁in ▁over ▁ 5 0 ▁different ▁s nake ▁species . ▁It ▁is ▁most ▁common ▁in ▁bo as , ▁p yth ons , ▁trop id op hi ids , ▁col ub rid s ▁and ▁el ap ids ▁of ▁the ▁genus ▁A can th oph is . ▁It ▁is , ▁however , ▁the ▁most ▁obvious ▁in ▁v ip ers ▁and ▁pit ▁v ip ers , ▁especially ▁in ▁r att les n akes . ▁As ▁the ▁s nake ▁is ▁waiting ▁for ▁its ▁pre y , ▁it ▁is ▁co iled ▁up ▁and ▁has ▁its ▁distinct ively ▁marked ▁tail ▁elev ated , ▁visible ▁and ▁moving ▁in ▁a ▁way ▁that ▁capt ures ▁the ▁attention ▁of ▁its ▁pre y . ▁Once ▁the ▁pre y ▁is ▁in ▁striking ▁range , ▁the ▁s nake ▁capt ures ▁the ▁pre y . ▁Due ▁to ▁the ▁tail ▁res emb ling ▁a ▁wr ith ing ▁c ater p ill ar ▁and ▁another ▁w orm - like ▁insect ▁lar va e , ▁the ▁tail ▁of ▁the ▁s nake ▁is ▁often ▁referred ▁to ▁as ▁a ▁verm iform . ▁One ▁elaborate ▁example ▁of ▁ca ud al ▁l uring ▁occurs ▁in ▁the ▁sp ider -