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close| Location | Bulgaria, Burgas |
| Central coordinates | 26o 43.50' East 42o 2.90' North |
| IBA criteria | B2, C6 |
| Area | 34,864 ha |
| Altitude | 121 - 549m |
| Year of IBA assessment | 2005 |
Ornithological information One of the most important breeding sites for Aquila pomarina in Bulgaria. Significant proportion (³1%) of national population breeding at site: Circaetus gallicus (1 pair), Bubo bubo (1 pair), Dendrocopos medius (min. 3 pairs), Hippolais olivetorum (min. 2 pairs).
Site description The Derventski hills are situated between the Tundzha river and the border with Turkey. They are partly covered by broadleaved deciduous forests of Quercus and Carpinus, with Mediterranean trees and shrubs, and there are also open grassy and bushy areas with scattered trees, and arable land. Shrubland is dominated by Paliurus, Jasminum and Nigella. Land-uses are extensive stock-rearing and cultivation, hunting and forestry.
Populations of IBA trigger species
| Species | Season | Period | Population estimate | Quality of estimate | IBA Criteria | IUCN Category |
|---|---|---|---|---|---|---|
| Black Stork Ciconia nigra | breeding | 2000 | 7 breeding pairs | good | C6 | Least Concern |
| Black Kite Milvus migrans | breeding | 2001 | 4-5 breeding pairs | good | C6 | Least Concern |
| Western Marsh-harrier Circus aeruginosus | resident | 2001 | 3-4 breeding pairs | good | C6 | Least Concern |
| Montagu's Harrier Circus pygargus | resident | 2001 | 5-7 breeding pairs | good | C6 | Least Concern |
| Lesser Spotted Eagle Aquila pomarina | breeding | 2001 | 15 breeding pairs | good | B2, C6 | Least Concern |
| Booted Eagle Hieraaetus pennatus | breeding | 2001 | 3-5 breeding pairs | good | B2, C6 | Least Concern |
| Olive-tree Warbler Hippolais olivetorum | breeding | 2005 | 400 breeding pairs | good | B2, C6 | Least Concern |
Protected areas
| Protected area | Designation | Area (ha) | Relationship with IBA | Overlap with IBA (ha) | |
|---|---|---|---|---|---|
| Derventski Heights - BG0002026 | Birds Directive | 34,864 | is identical to site | 34,864 | |
| Derventski vazvisheniya 1 - BG0000218 | Habitats Directive | 38,696 | protected area contains site | 34,864 | |
| Derventski vazvisheniya 2 - BG0000219 | Habitats Directive | 55,036 | protected area is adjacent to site | 0 | |
| Zhdreloto na reka Tundzha - BG0000217 | Habitats Directive | 7,857 | protected area overlaps with site | 500 |
Habitats
| IUCN habitat | Habitat detail | Extent (% of site) |
|---|---|---|
| Forest | Broadleaved deciduous woodland | 58% |
| Shrubland | Sclerophyllous scrub, garrigue and maquis; Scrub | 23% |
| Grassland | Mesophile grasslands; Steppes and dry calcareous grassland | 7% |
| Artificial landscapes (terrestrial) | Arable land | 12% |
Land use
| Land-use | Extent (% of site) |
|---|---|
| agriculture | 42% |
| forestry | 58% |
| hunting | - |
Protection status National None International None
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Recommended citation BirdLife International (2013) Important Bird Areas factsheet: Derventski Heights. Downloaded from http://www.birdlife.org on 18/06/2013
To provide new information to update this factsheet or to correct any errors, please email BirdLife
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