Special Nature Reserve “Rtanj”
Rtanj covers an area of almost 5,000 hectares with exceptional geological, geomorphological, biological, historical and aesthetic values, and rocks of different ages from the Palaeozoic, Mesozoic and Cenozoic periods. Of particular value is the relief with the pointed peak “Šiljak”. It is a habitat for strictly protected species of Serbian flora – Ramonda serbica, Rtanj mint, Orchis, Orchis coriophora, Paeonia mascula, Alpine clematis, Pulsatilla alpina, Gentiana acaulis, Gentiana kochiana. It is also the habitat for the extremely rare and endemic species of Nepeta rtanjensis, and among medicinal species, Rtanj tea particularly stands out. There are 89 bird species at Rtanj, and 20 registered species of bats that account for 2/3 of the total number of bats in Serbia. There are as well indigenous fish species in the streams of the foothills of the Rtanj Mountain (Brown Trout, Mediterranean Barbel, Gobio Gobio, etc.), while completely isolated populations of interesting species in terms of evolutionary changes are recorded in Vrmdža Lake. Based on the Study of Protection, conducted by the Institute for Nature Conservation of Serbia, the Special Nature Reserve “Rtanj” was declared a protected area of the first category of international, national, and exceptional importance.
Danko Jović, Msc; Institute for Nature Conservation of Serbia
Monument of Nature “Borač Karst”
“Borač Karst” covers an area of 68,22 hectares and represents the remnants of the lava dome, formed by the swelling of the thick masses of acid lava, parts of which have been eroded over time, thus creating a distinctive appearance of the area. Together with the Gruža Lake, it forms the IBA area (Important Bird Area). There are 79 bird species recorded at the very Karst – 21,9% of the total bird diversity in Serbia, primarily predators – 11 species (Honey Buzzard, Common Buzzard, etc.), nocturnal predators (Eagle Owl, Tawny Owl, Long–Eared Owl, etc.) and dozens of passerines of the area (Woodlark, Cirl Bunting, etc.). During the Middle Ages, the “Borač Karst” was an important fortification and on it there used to be the town of Borač. The remains of the former fortification, with the Church of the Holy Archangel Gabriel and the old cemetery at the foot of the Karst, represent the architectural and petrological objects of Serbia’s geological heritage, since they were built of stone from the “Borač Karst”. Based on the Study of Protection, conducted by the Institute for Nature Conservation of Serbia, the Monument of Nature “Borač Karst” was declared a protected area of the first category of international, national, and exceptional importance.
Mirjana Nikolić, Geology Eng.; Institute for Nature Conservation of Serbia
Artistic realization of the stamps: Miroslav Nikolić