The Silkosiya Reservation is the first reservation in Bulgaria. It was declared by Decree No 8485 of 29 June 1933 of the Ministry of Agriculture and State Properties as “strictly guarded state forest “Gorna Elenitsa – Silkosiya”” within the locality of the village of Balgari and village of Kosti, municipality of Tsarevo, county of Burgas, with area of 10,226 dca (1,022.6 ha). Consequently, the territory and the buffer zone were modified a number of times.
The Silkosiya Reservation preserves the precious plant and animal wealth of Strandzha mountain. The reservation territory is situated at 100 to 250 meters altitude. The most wide-spread soils are maroon forest soils and sulphurous-podzolic soils.
The plant diversity in the reservation is significant. 260 species of higher plants have been found. There are divided into the following categories – 14 wood species, 17 bush species, 143 perennial grasses, and 70 annual and biennial plants. This is 22.6 % of the Strandzha flora and determines the high value of the protected territory.
Silkosiya is a typical forest reservation. It preserves forests of beech and oak, evergreen bushes – Rhododendron Ponticum L., Prúnus laurocerásus, Ilex aquifolium, Daphne pontica. The average age of the trees is 120-130 years, and in individual cases, it exceeds 200 years.
The most impressive forest formations are Quercus polycarpa and Fagus orientalis. The following species can be seen as companions of the basic wood species: Sorbus torminalis, Sorbus domestica, Tilia tomentosa, Acer campestre and Pyrus communis.
The reservation also contains diverse fauna – more than 50 protected animal species are established. The following amphibious species can be seen: green toad (Pseudepidalea viridis), wood frog (Hila arborea, L.) and Greek long-legged frog (Rana graeca), which are protected by the Biological Diversity Law.
The following reptiles can also be seen: Anguis fragilis, Ophisaurus apodus, Coluber caspius, Elaphe longissima, Elaphe sauromates and Malpolon monspessulanus – which are also protected species. The following turtle species are very typical for these places: Testudo hermanni and Testudo graeca.
Bird species are also very diverse. Jay (Garrulus glandarius), yellowhammer (Oriolus oriolus), south nightingale (Erithacus megarhynchos), small blackhead garden warbler (Sylvia melanocephala) and big whiteneck garden warbler (Sylvia communis), common finch (Fringilla coelebs), blackbird (Turdus merula), various woodpecker species, birds of prey, etc. are typical for the protected territory.
The animal diversity is completed by multiple mammals: wild boar (Sus scrofa), wild cat (Felis silvestris), marten (Martes foina, Martes martes), wolf (Canis lupus), etc.
Any type of human activity, excluding its guarding, scientific visits, passing of people along marked paths, including with education purposes is forbidden in the reservation.
Tourists must contact the Regional Inspectorate of Environment and Waters of Burgas for tour guides and lectures. Guided tours are conducted by an expert upon a preliminary request in the Regional Inspectorate of Environment and Waters of Burgas.
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