ta iled ▁horn ed ▁vi per , ▁which ▁emp lo ys ▁a ▁highly ▁modified ▁tail ▁to ▁m im ic ▁a ▁sp ider ' s ▁form ▁and ▁lo com otion . ▁ ▁Ca ud al ▁l uring ▁is ▁more ▁frequently ▁observed ▁in ▁ju ven ile ▁sn akes . ▁Of ▁the ▁sn akes ▁that ▁practice ▁the ▁ca ud al ▁l uring ▁behavior , ▁ 8 0 % ▁of ▁the ▁sn akes ▁are ▁ju ven ile . ▁The ▁t ails ▁of ▁ju ven ile ▁sn akes ▁are ▁often ▁a ▁v ibr ant ▁color , ▁making ▁them ▁difficult ▁to ▁ignore . ▁As ▁the ▁ju ven ile ▁sn akes ▁m ature ▁into ▁ad ul th ood , ▁their ▁tail ▁color ▁will ▁become ▁consistent ▁with ▁the ▁rest ▁of ▁their ▁body . ▁Ju ven ile ▁sn akes ▁have ▁a ▁smaller ▁l ure ▁compared ▁to ▁the ▁size ▁of ▁an ▁adult ' s ▁l ure . ▁Studies ▁show ▁that ▁a ▁smaller ▁l ure ▁is ▁more ▁effective ▁in ▁attract ing ▁pre y , ▁as ▁it ▁is ▁closer ▁to ▁the ▁size ▁of ▁the ▁w orm - like ▁pre y . ▁This ▁may ▁explain ▁why ▁ca ud al ▁l uring ▁is ▁more ▁often ▁seen ▁and ▁successful ▁in ▁younger ▁sn akes . ▁ ▁Sh arks ▁ ▁Ca ud al ▁l uring ▁is ▁found ▁in ▁some ▁sh arks , ▁being ▁common ▁among ▁three ▁species : ▁Alo pi as ▁val pin ue , ▁Alo pi as ▁super cil ios us ▁and ▁Alo pi as ▁pel ag icus ; ▁they ▁have ▁t ails ▁( el ong ated ▁d ors