▁their ▁to x in , ▁which ▁is ▁the ▁to ad ' s ▁main ▁defense ▁mechanism . ▁Because ▁of ▁this , ▁to ads ▁do ▁not ▁tend ▁to ▁hide ▁and ▁are ▁usually ▁target ed ▁by ▁pred ators , ▁who ▁then ▁expose ▁themselves ▁to ▁the ▁to xic ▁effects . ▁One ▁study ▁suggests ▁Australian ▁re pt iles ▁are ▁greatly ▁threatened ▁by ▁invasion ▁of ▁the ▁can e ▁to ad , ▁more ▁so ▁than ▁any ▁other ▁group . ▁Se vent y - five ▁species ▁of ▁cro cod iles ▁and ▁fresh water ▁t urt les ▁were ▁found ▁to ▁be ▁at ▁risk ▁of ▁invasion , ▁and ▁all ▁species ▁studied ▁were ▁found ▁capable ▁of ▁e ating ▁a ▁to ad ▁large ▁enough ▁to ▁kill ▁them . ▁All ▁fresh water ▁t urt les ▁and ▁cro cod iles ▁are ▁predicted ▁to ▁share ▁part ▁of ▁their ▁future ▁distribution ▁with ▁the ▁invas ive ▁species ▁by ▁ 2 0 3 0 . ▁Australia ' s ▁var an ids ▁and ▁ag am ids ▁are ▁also ▁at ▁a ▁great ▁risk . ▁ ▁It ▁is ▁reported ▁that ▁one ▁native ▁fresh water ▁t urt le ▁species , ▁My uch ely s ▁lat is tern um ▁( s aw - sh elled ▁t urt le ), ▁which ▁ranges ▁along ▁rivers ▁and ▁streams ▁from ▁Cape ▁York ▁Pen ins ula ▁to ▁northern ▁New ▁South ▁Wales , ▁is ▁one ▁of ▁the ▁few ▁native ▁animals ▁which ▁is ▁a ▁successful ▁pred ator ▁of ▁can e ▁to ads . ▁The ▁larger ▁the ▁animal , ▁or ▁pred ator , ▁is ▁the ▁better ▁chance ▁they ▁have ▁of ▁surv ival , ▁as