Czechia plays a key role in the conservation of Przewalski’s horse, the last truly wild horse species. Through the Return of the Wild Horses project, Czech conservationists have successfully reintroduced these horses to their native habitats in Mongolia. Prague Zoo, a leader in breeding and reintroduction efforts, has helped transport dozens of Przewalski’s horses back to the wild, strengthening global conservation efforts and restoring ecological balance in their historic range.

Doesn't have to be directly Czechia associated, but these horses are very cute and would look wonderful on a stamp imo.

Return of the Wild Horses project: https://en.wikipedia.org/wiki/Return_of_the_Wild_Horses

Sending a lot of love to everyone at Slowly! <3