 As of 2019 the estimated population in the Chernobyl zone is over 100 individuals.An intensely researched population of free-ranging animals was also introduced to the Hortobágy National Park" puszta" in Hungary; data on social structure, behavior, and diseases gathered from these animals are used to improve the Mongolian conservation effort.Several American zoos also collaborated in breeding "E. f. przewalskii" from 1979 to 1982.