▁of ▁the ▁tail ▁is ▁white ▁with ▁black ▁cross bars . ▁M ales ▁have ▁a ▁pair ▁of ▁black ▁bl ot ches ▁on ▁their ▁sides , ▁extending ▁to ▁blue ▁patch es ▁on ▁their ▁bel lies . ▁Fem ales ▁have ▁no ▁blue ▁patch es , ▁and ▁the ▁black ▁bars ▁are ▁either ▁faint ▁or ▁completely ▁absent . ▁ ▁Be havior ▁Z eb ra - ta iled ▁l iz ards ▁are ▁di urn al ▁and ▁alert . ▁They ▁rise ▁early ▁and ▁are ▁active ▁in ▁all ▁but ▁the ▁h ott est ▁weather . ▁During ▁the ▁h ott est ▁times ▁of ▁day , ▁l iz ards ▁may ▁stand ▁altern ately ▁on ▁two ▁legs , ▁switching ▁to ▁the ▁opposite ▁two ▁as ▁needed ▁in ▁a ▁kind ▁of ▁dance . ▁When ▁threatened ▁they ▁will ▁run ▁swift ly ▁with ▁their ▁to es ▁cur led ▁up ▁and ▁t ails ▁raised ▁over ▁their ▁back s ▁expos ing ▁the ▁stri pes . ▁When ▁stopped , ▁they ▁w ag ▁their ▁cur led ▁t ails ▁side - to - side ▁to ▁dist ract ▁pred ators . ▁They ▁can ▁even ▁run ▁on ▁their ▁h ind ▁legs ▁for ▁short ▁distances . ▁In ▁areas ▁of ▁cre os ote ▁scr ub ▁this ▁l izard ▁ ▁to ▁reach ▁highest ▁dens ities , ▁around ▁ 4 . 8 ▁to ▁ 6 . 0 ▁individuals ▁per ▁a cre ▁( 6 0 0 ▁to ▁ 8 0 0 ▁m ² ▁per ▁l izard ). ▁This ▁l izard ▁bur rows ▁into ▁fine ▁sand ▁for ▁retre at ▁at ▁night ▁and ▁usually ▁see ks ▁day ▁shelter ▁in ▁the ▁sh ade