I don't know about the Western countries, but the problem of lizards or say vermin in electrical substations seems to be problem with no solution at least in India. Recently even after fortnightly checks on vermin proofing, there was a flash over in one of the 11kV panel in our plant leading to unwanted shutdown, suggestions will appreciated for control the vermin proofing of the substations.Glue pads, fumigation sealing etc. are done as much as possible.