Within the framework of the international amateur radio program “World Flora and Fauna” (WWFF) http://wwff.co/, amateur radio enthusiasts around the world advocate for nature and the environment by participating in various environmental events. The most active part in the WWFF program, as well as its Russian counterpart, “Russian Flora and Fauna” (RFF) http://www.outdoorqrp.org/ru/, is also taken by Orenburg radio amateurs. Their work on the air is aimed, inter alia, at popularizing the Orenburg and Shaitan-Tau reserves on a global scale. The Orenburg regional branch of the All-Russian public organization of radio sports “Union of radio amateurs of Russia”, the radio club “Southern Ural” and the FSBI “Reserves of the Orenburg Region” hold Activity Days on October 9–13, 2019, dedicated to the 5th anniversary of the establishment of the Shaitan-Tau State Nature Reserve https://orenzap.ru/territory/zapovednik-shaytan-tau-/zapovednik-shaytan-tau/. Work on the air will be perfomed under the special callsign RZ9SFF, on all HF bands in CW, SSB and DIGI. All radio amateurs who will make contacts during the specified period with a special station RZ9SFF will receive memorable QSL cards. QSL-manager will be Vladimir UA9SIV. Follow the information in the cluster! See you in the air! 73!+44!