Ants I have seen in zoos:
-Acromyrmex ambiguus (Krefeld Zoo)
-Atta cephalotes (Bristol Zoo, Central Park Zoo, Chester Zoo, Cincinnati Zoo & Botanical Garden, Colchester Zoo, Cotswold Wildlife Park, Edinburgh Zoo, Paignton Zoo, Reaseheath College Zoo, Rodbaston Animal Zone, Smithsonian National Zoological Park, Tropical World Leeds, Wrocław Zoological Garden, ZSL London Zoo)
-Atta texana (Dallas Zoo, Houston Zoo)
-Formica rufa (Wildwood Discovery Park)
-Myrmecocystus mendax (Cincinnati Zoo)*
-Novomessor cockerelli (Philadelphia Zoo)
-Oecophylla smaragdina (ZSL London Zoo)*
-Paraponera clavata (Cincinnati Zoo)*
-Pheidole rhea (Cincinnati Zoo)*
-Pogonomyrmex maricopa (Living Desert Zoo)
-Polyrhachis dives (Berlin Zoo)
-Solenopsis invicta (Dallas Zoo)
-Dasymutilla occidentalis (Fort Worth Zoo)
*Species that probably aren't kept by that collection anymore.
~Thylo
-Acromyrmex ambiguus (Krefeld Zoo)
-Atta cephalotes (Bristol Zoo, Central Park Zoo, Chester Zoo, Cincinnati Zoo & Botanical Garden, Colchester Zoo, Cotswold Wildlife Park, Edinburgh Zoo, Paignton Zoo, Reaseheath College Zoo, Rodbaston Animal Zone, Smithsonian National Zoological Park, Tropical World Leeds, Wrocław Zoological Garden, ZSL London Zoo)
-Atta texana (Dallas Zoo, Houston Zoo)
-Formica rufa (Wildwood Discovery Park)
-Myrmecocystus mendax (Cincinnati Zoo)*
-Novomessor cockerelli (Philadelphia Zoo)
-Oecophylla smaragdina (ZSL London Zoo)*
-Paraponera clavata (Cincinnati Zoo)*
-Pheidole rhea (Cincinnati Zoo)*
-Pogonomyrmex maricopa (Living Desert Zoo)
-Polyrhachis dives (Berlin Zoo)
-Solenopsis invicta (Dallas Zoo)
-Dasymutilla occidentalis (Fort Worth Zoo)
*Species that probably aren't kept by that collection anymore.
~Thylo