Kammala wannan jumla: Birnin ya sayi nuni na farko, Flight Cage, daga Cibiyar Smithsonian bayan
1904 St. Louis Duniya Fair. Bayan da aka kafa gidan zoo a 1910, an kara sabbin kayan baje koli, yankuna, da gine-gine a cikin shekarun da suka gabata don inganta kula da dabbobin, dabbobin da ke nunawa da wuraren zama, da ilimi da fassara. Shugaban kudu namiji, da ƙahoninsa masu kyau, alama ce ta gidan namun daji na Saint Louis.