Database release:

For Special Protection Areas (SPA),
Proposed Sites for Community Importance (pSCI),
Sites of Community Importance (SCI) and
for Special Areas of Conservation (SAC)



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1.1 Type


1.2 Site code


1.3 Site name


1.4 First Compilation date


1.5 Update date


1.6 Respondent:

Name/Organisation:Ministry of Environment and Water, “National Nature Protection Service” Directorate
Address:  Sofia  22    Sofia    1000  Kn. Maria Luiza Blvd.

1.7 Site indication and designation / classification dates

Date site proposed as SCI:2007-03
Date site confirmed as SCI:2008-12
Date site designated as SAC: No data
National legal reference of SAC designation: No data
Explanation(s):Adopted by Council of Ministers Decision No. 122/02.03.2007 (promulgated SG 21/2007). Extended by Council of Ministers Decision No. 811/16.11.2010 (promulgated SG 96/2010).


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2.1 Site-centre location [decimal degrees]:


2.2 Area [ha]


2.3 Marine area [%]


2.4 Sitelength [km]:


2.5 Administrative region code and name

NUTS level 2 code Region Name

2.6 Biogeographical Region(s)

Continental (100.00 %)


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3.1 Habitat types present on the site and assessment for them

Annex I Habitat types Site assessment
Code PF NP Cover [ha] Cave [number] Data quality A|B|C|D A|B|C
      RepresentativityRelative SurfaceConservationGlobal
2340  info      616.16  0.00 
3130  info      4.92552  0.00   
3150  info      130.364  0.00   
3260  info      34.27  0.00 
3270  info      4.32  0.00 
6430  info      250.02  0.00 
91E0  info      90.02  0.00 
91F0  info      58.88  0.00 
  • PF: for the habitat types that can have a non-priority as well as a priority form (6210, 7130, 9430) enter "X" in the column PF to indicate the priority form.
  • NP: in case that a habitat type no longer exists in the site enter: x (optional)
  • Cover: decimal values can be entered
  • Caves: for habitat types 8310, 8330 (caves) enter the number of caves if estimated surface is not available.
  • Data quality: G = 'Good' (e.g. based on surveys); M = 'Moderate' (e.g. based on partial data with some extrapolation); P = 'Poor' (e.g. rough estimation)

3.2 Species referred to in Article 4 of Directive 2009/147/EC and listed in Annex II of Directive 92/43/EEC and site evaluation for them

Species Population in the site Site assessment
G Code Scientific Name S NP T Size Unit Cat. D.qual. A|B|C|D A|B|C
      MinMax  Pop.Con.Iso.Glo.
F4125Alosa immaculata          DD 
F1130Aspius aspius    5351710  5351710  area 
A1188Bombina bombina    localities 
F1149Cobitis taenia    26891  26891 
R1220Emys orbicularis    localities 
F2484Eudontomyzon mariae    5374900  5374900  area 
F2555Gymnocephalus baloni    4435090  4435090  area 
F1157Gymnocephalus schraetzer    5083130  5083130  area 
M1355Lutra lutra     
M2609Mesocricetus newtoni          DD       
F1145Misgurnus fossilis    62828  62828 
F2522Pelecus cultratus    5350000  5350000  area 
F5339Rhodeus amarus    149702  149702 
F5329Romanogobio vladykovi    5349300  5349300  area 
F1146Sabanejewia aurata    5353650  5353650  area 
M1335Spermophilus citellus          DD       
I4064Theodoxus transversalis    930  930 
A1993Triturus dobrogicus    localities 
I1032Unio crassus    13446  13446 
F1160Zingel streber    5349650  5349650  area 
F1159Zingel zingel    5349650  5349650  area 
  • Group: A = Amphibians, B = Birds, F = Fish, I = Invertebrates, M = Mammals, P = Plants, R = Reptiles
  • S: in case that the data on species are sensitive and therefore have to be blocked for any public access enter: yes
  • NP: in case that a species is no longer present in the site enter: x (optional)
  • Type: p = permanent, r = reproducing, c = concentration, w = wintering (for plant and non-migratory species use permanent)
  • Unit: i = individuals, p = pairs or other units according to the Standard list of population units and codes in accordance with Article 12 and 17 reporting (see reference portal)
  • Abundance categories (Cat.): C = common, R = rare, V = very rare, P = present - to fill if data are deficient (DD) or in addition to population size information
  • Data quality: G = 'Good' (e.g. based on surveys); M = 'Moderate' (e.g. based on partial data with some extrapolation); P = 'Poor' (e.g. rough estimation); VP = 'Very poor' (use this category only, if not even a rough estimation of the population size can be made, in this case the fields for population size can remain empty, but the field "Abundance categories" has to be filled in)

3.3 Other important species of flora and fauna (optional)


Population in the site


Group CODE Scientific Name S NP Size Unit Cat. Species Annex Other categories
     MinMax C|R|V|PIVVABCD
Alkanna tinctoria                   
Asellus aquaticus                     
Bufo viridis                   
Carassius auratus                     
Centaurea arenaria                   
Coluber caspius                     
Cybister laterimarginalis                     
Cyprinus carpio                   
Elaphe longissima                   
Erpobdella octoculata                     
Esox lucius                   
Glossiphonia complanata                     
Hirudo medicinalis                     
Hyla arborea                   
Lacerta viridis                   
Leucaspius delineatus                     
Lymnaea stagnalis                     
Natrix tessellata                   
Nuphar lutea                   
Nymphaea alba                   
Nymphoides peltata                   
Pelobates fuscus                   
Pelobates syriacus                   
Planorbarius corneus                     
Planorbis planorbis                     
Podarcis taurica                     
Proterorhinus marmoratus                   
Radix auricularia                     
Rana dalmatina                   
Sabanejewia bulgarica                   
Salvinia natans                   
Senecio paludosus                   
Silurus glanis                   
Stagnicola palustris                     
Utricularia vulgaris                   
Vipera ammodytes                   
Viviparus viviparus                     
  • Group: A = Amphibians, B = Birds, F = Fish, Fu = Fungi, I = Invertebrates, L = Lichens, M = Mammals, P = Plants, R = Reptiles
  • CODE: for Birds, Annex IV and V species the code as provided in the reference portal should be used in addition to the scientific name
  • S: in case that the data on species are sensitive and therefore have to be blocked for any public access enter: yes
  • NP: in case that a species is no longer present in the site enter: x (optional)
  • Unit: i = individuals, p = pairs or other units according to the standard list of population units and codes in accordance with Article 12 and 17 reporting, (see reference portal)
  • Cat.: Abundance categories: C = common, R = rare, V = very rare, P = present
  • Motivation categories: IV, V: Annex Species (Habitats Directive), A: National Red List data; B: Endemics; C: International Conventions; D: other reasons


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4.1 General site character

Habitat class % Cover

Total Habitat Cover


Other Site Characteristics

The site comprises the former Orsoya marsh, located at the bank of the Danube. It also includes a group of islands and a part of the bank, covered by forest vegetation. There are systems of dikes, cannals, pumps and other draining facilities. The main habitats in the former marsh are the areas, covered by marsh vegetation, where reed and rush communities dominate. There are also open water surfaces as well as humid meadows. The cultivation of the arable land depends on the success of the draining activities.

4.2 Quality and importance

The site is a former floodplain, which was drained. The arable lands were used, but now are abandoned. There is a natural restoration of the former marshes. There are sand dunes in the plain, which cover very big area. They are the most representative in Bulgaria. The former breeding-ponds of Orsoya are abandoned and now they are with natural regime of floodinga and are covered by different aquatic plant communities. The near Kovachev (Dobrina) Island is covered by natural alluvial forest (Salix, Populus, Ulmus, Quercus robur, Fraxinus oxycarpa).

4.3 Threats, pressures and activities with impacts on the site

The most important impacts and activities with high effect on the site

Negative Impacts
RankThreats and pressures [code]Pollution (optional) [code]inside/outside [i|o|b]
Positive Impacts
RankActivities, management [code]Pollution (optional) [code]inside/outside [i|o|b]

Rank: H = high, M = medium, L = low
Pollution: N = Nitrogen input, P = Phosphor/Phosphate input, A = Acid input/acidification,
T = toxic inorganic chemicals, O = toxic organic chemicals, X = Mixed pollutions
i = inside, o = outside, b = both

4.5 Documentation

Initial proposal and description of the site made by T. Trichkova, T. Stefanov, M. Vasilev, M. Zhivkov - Institute of Zoology, 1 Tsar Osvoboditel Blvd., 1000 Sofia; Mladen Angelov - Green Balkans Federation; Dr. R. Tzonev - Sofia University; Dr. Georgi Hinkov - Forest Research Institute, BAS. Initially listed publications:" Arnold, E., J. Burton, D. Ovenden. 1992. A field guide to the Reptiles and Amphibians of Britain and Europe. Collins Publ., London, 272 pp. " Benda, P., T. Ivanova, I. Horacek, V. Hanak, J. Gaisler, J. Cerveny, J. Gaisler, A. Georgieva, B. Petrov, V. Vohralik. 2003. Bats (Mammalia: Chiroptera) of the Eastern Mediterranean. Part 3. Review of bat distribution in Bulgaria. Acta Soc. Zool. Bohem., 67, 245-357. " Cramp, St. 1983. Handbook of the Birds of Europe the Middle East and North Africa. The Birds of the Western Palearctic. Volume 4. Oxford University Press, 48-62 pp. " Cramp, St., K. Simmons et al. 1977. Handbook of the Birds of Europe the Middle East and North Africa. The Birds of the Western Palearctic. Volume I : Ostrich to Ducks. Oxford University Press. " Delany, S., C. Reyes, E. Hubert, S. Pihl, E. Rees, L. Haanstra, A. Strien. 1999. Results from the International Waterbird Census in the Westwrn Paleactic and Southwest Asia 1995 and 1996. Wetlands International Publication, 54, 178 pp. " Georgiev, D. 2003. A report of Mesocricetus newtoni (Mammalia: Cricetidae) from South-Eastern Bulgaria. Trav. Sci. Univ. Plovdiv, Animalia, 39 (6), 107-110. " Ivanova, T. 2005. Important Bat Underground Habitats (IBUH) in Bulgaria. Acta zool. Bulg. " Horacek, I., J. Cerveny, A. Tausl, D. Vitek. 1974. Notes on the Mammal fauna of Bulgaria (Insectivora, Chiroptera, Rodentia). Vestnik Cesk. Spol. Zool., XXXVIII, 1,19-31. " Karapetkova, M., M. Zhivkov . 1995. Fish in Bulgaria. Sofia. "Gea Libris", 247 pp. " Kavrakova, V., D. Dimova, M. Dimitrov, R. Tsonev, T.Belev (ed.). 2005. Guide for identification of habitats of European significance in Bulgaria. WWF DCP, Green Balkans Federation. Sofia. 128 pp. " Kostadinova, I. (compiler). 1997. Important Bird Areas in Bulgaria. BSPB, Sofia. " Kostadinova, I., S. Dereliev. 2001. Results from the midwinter census of waterfowl in Bulgaria for the period 1997-2001 year, Sofia. " Macdonald, D., P. Barret. 1993. Mammals of Britain & Europe. Collins field guide, Harper Collins Publ., London, 312 pp. " Michev, T., L. Profirov. 2003. Mid-winter Numbers of Waterbirds in Bulgaria (1977-2001). Results form 25 years of mid-winter counts carried out at the most important Bulgarian wetlands. Sofia - Moscow, 160. " Mihov, S. 2002. Field guide of amphibians in Bulgaria, Bourgas Wetlands, 45 pp. " Milchev, B., Z. Boev, V. Georgiev. 2004. Die Nahrung der Schleiereule (Tyto alba) in Sudost-Bulgarien. Egretta, 47, 66-77. " Nankinov, D., S. Simeonov, T. Michev, B. Ivanov. 1997. Fauna of Bulgaria. Vol. 26: Aves, Part . Sofia, Academic Publishing House "Prof. M. Drinov", 427 pp. " Nankinov, D. et al. 2004.Breeding totals of the ornithofauna in Bulgari. Green Balkans, Plovdiv, 32 pp. " Ornithological database of Green Balkans Federation of Nature Conservation NGOs. " Patev, P. 1950. Birds in Bulgaria. BAS, Sofia, 364 pp. " Peshev, T., D. Peshev, V. Popov. 2004. Fauna of Bulgaria. Vol. 27: Mammalia.Sofia. Academic Publishing House "Prof. M. Drinov", 632 pp. " Popov, V. 2003. Mammals in Bulgaria. Vitosha Nature Park Directorate, Sofia, "Geosoft", 291 pp. " Roché, J. 2000. Die Vogelstimmen Europas auf 4 CDs - Rufe und Gesänge. "Kosmos". " Shurulinkov, P., R. Tsonev, B. Nikolov, G. Stoyanov, L. Assenov. 2005. Birds of Middle Danube Plain. Sofia. 120 pp. In Bulgarian. " Simeonov, S., T. Michev. 1991. The birds of the Balkan Peninsula. "Peter Beron", Sofia, 249 pp. " Simeonov, S., T. Michev, D. Nankinov. 1990. Fauna in Bulgaria. Vol. 20 Aves. Part . S., BAS, 350 pp. " Simeonov, S., T. Michev. 1991. Birds of the Balkan Peninsula. Peter Beron, Sofia, 245 pp. " Swensson, L. 1992. Identification guide to European Passerines. Stockholm. " Swensson L., P. Grant. 2000. Bird guide. Harper Collins Publishers, London, 392 pp. " CORINE BIOTOPES database " Sakalyan, M. (eds.). 1993. National Strategy for Biodiversity Conservation. Main Reports. Volume 1 Data revised by a team of Bulgarian Academy of Sciences ( Data revised by a team of the Institute for Biodiversity and Ecosystem Research, BAS. New data provided by project "Mapping and assessment of the conservation status of the natural habitats and species - Phase 1" (see link).


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5.1 Designation types at national and regional level:

Code Cover [%]

5.2 Relation of the described site with other sites:

Designated at national or regional level:

Type code Site name Type Cover [%]
BG06Ribarnitzi Orsoya+5.33

5.3 Site designation (optional)

This is the most important site in Bulgaria for the habitat 2340 - inland dunes. There is a big diversity of habitats, plants and animals (especially birds), which are with nature-conservation importance. The site is Important Bird Area.


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6.1 Body(ies) responsible for the site management:

Organisation:Regional Inspectorate of Environment and Water: Montana

6.2 Management Plan(s):

An actual management plan does exist:

No, but in preparation

6.3 Conservation measures (optional)

Restoration of the natural alluvial forests. Stopping of the illegal excavations on the dunes. Restoration of part from the former marshes on the place of the breeding-ponds.



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