Maria Katharina , circus animal trainer in Germany Born 1908? in Germany dead 1973 in United States . A famous bear troupe that started in the 1950s was the "Klauser's Bears", by the German-born Klauser family, Walter, Maria, and their daughter "Goldilocks" Herta. The Klauser family toured the world with their bears riding bicycles and motorbikes, rowing boats, and of course roller skating. The Klauser's Bears were popular in the US, appearing in the Ringling Brothers and Barnum & Bailey Circus and being featured several times in the Ed Sullivan Show in the 1950s, and in the Shrine Circus until (at least) the 1970s