 The population of Przewalski's horse in the Great Gobi B SPA was drastically affected, providing clear evidence of the risks associated with reintroducing small and sequestered species in unpredictable and unfamiliar environments.Since 2011, Prague Zoo has transported 35 horses to Mongolia in eight rounds, in cooperation with partners (Czech Air Force, European Breeding Programme for Przewalski's Horses, Association pour de cheval du Przewalski