Recently conflicts between wildlife and human becomes worldwide problem, but conservation of wild animals is also a current hot topic. We are developing a unique multilegged robot “Goat” series for animal menacing to reduce wildlife damage. For the goat series, we employed simple mechanical leg driving system - inverted Chebyshev link with 3D trot vectoring mechanism, so the durability is relative higher than conventional legged robot. We have already reported the concept model “GuardianGoat” and its partial mechanism. In this report, we will describe bear-size modified “GuardianGoat” with the wheel-leg switching mechanism, which enables the robot for practical operation in various fields.