Know who is Mouse which is Lord Ganesha's vehicle
According to the Mythology, Lord Ganeshas vahan i.e Mouse was a Gandharva who was a celestial singer in his previous birth, named Kroncha, in the court of Indra Dev. One day, Kroncha insulted sage Vaamedeva. And the sage got angry and cursed him to become a mouse. Krauncha forgot his role as a musician and derived all the characteristics of a mouse.