Karl Ruß

Karl Friedrich Otto Ruß was a Prussian pharmacist, aviculturist, author of bird-keeping books, and the founding editor of the world's first bird-fancier magazine Die Gefiederte Welt. Along with Bruno Dürigen, he also founded the magazine Isis in 1876. He sometimes wrote under the pseudonym "Berthold Schwarz". He was among the few who managed to breed the now extinct Carolina parakeets in captivity.