Masha, an 11-year-old bear from a travelling circus troupe based in Moscow, walks in costume during rehearsals in the Circus on Fontanka in St. Petersburg

Masha, an 11-year-old bear from a travelling circus troupe based in Moscow, walks in costume during rehearsals in the Circus on Fontanka in St. Petersburg February 1, 2013. The troupe, which has four bears who have completed a three year training programme, will soon perform for the first time in 20 years in Russia's second city. Picture taken February 1, 2013. REUTERS/Alexander Demianchuk (RUSSIA - Tags: ANIMALS SOCIETY) - RTR3DCDW