He was the author of Kaferbuch (on beetles) Conchylienbuch (on shells) and  Schmetterlingsbuch  (on butterflies and moths) and Die Fortpflanzung europäischer und aussereuropäischer Vögel.
This individual authored a comprehensive guide to beetles, titled Kaferbuch, as well as a book on marine snails, Conchylienbuch. He also wrote a treatise on butterflies and moths, known as Schmetterlingsbuch, and explored the reproductive habits of European and non-European bird species.