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close| Location | Spain, Castilla y León |
| Central coordinates | 3o 30.00' West 42o 50.00' North |
| IBA criteria | B2, C2, C6 |
| Area | 37,800 ha |
| Altitude | 750 - 1,332m |
| Year of IBA assessment | 2000 |
Ornithological information This is an important site for cliff-nesting birds.
Site description A mountain range in the north of Burgos province with numerous cliffs and two small gorges. The slopes are covered by scrub, Pinus plantations and small Quercus and Fagus woodlands. The area is used for livestock grazing, forestry and hunting.
Populations of IBA trigger species
| Species | Season | Period | Population estimate | Quality of estimate | IBA Criteria | IUCN Category |
|---|---|---|---|---|---|---|
| Egyptian Vulture Neophron percnopterus | breeding | 1995 | 15 breeding pairs | good | B2 | Endangered |
| Northern Harrier Circus cyaneus | resident | 1995 | 15 breeding pairs | good | B2, C6 | Least Concern |
| Bonelli's Eagle Aquila fasciatus | resident | 1996 | 2-3 breeding pairs | good | C6 | Least Concern |
| Red-billed Chough Pyrrhocorax pyrrhocorax | resident | 1995 | 300-325 breeding pairs | good | B2, C2, C6 | Least Concern |
Protected areas
| Protected area | Designation | Area (ha) | Relationship with IBA | Overlap with IBA (ha) | |
|---|---|---|---|---|---|
| HOCES DEL ALTO EBRO Y RUDRÓN - ES4120036 | Birds Directive | 51,558 | protected area is adjacent to site | 0 | |
| HOCES DEL ALTO EBRO Y RUDRÓN - ES4120089 | Habitats Directive | 46,320 | protected area is adjacent to site | 0 | |
| MONTES OBARENES - ES4120030 | Birds Directive | 43,061 | protected area overlaps with site | 13,873 | |
| RIBERAS DEL RÍO OCA Y AFLUENTES - ES4120073 | Habitats Directive | 495 | protected area overlaps with site | 52 | |
| SIERRA DE LA TESLA-VALDIVIELSO - ES0000193 | Birds Directive | 21,231 | protected area contained by site | 21,231 | |
| SIERRA DE LA TESLA-VALDIVIELSO - ES4120094 | Habitats Directive | 25,420 | protected area overlaps with site | 19,079 |
Habitats
| IUCN habitat | Habitat detail | Extent (% of site) |
|---|---|---|
| Forest | Alluvial and very wet forest; Broadleaved deciduous woodland; Mixed woodland | 20% |
| Shrubland | Heathland; Scrub | 20% |
| Wetlands (inland) | Rivers and streams | 5% |
| Rocky areas | Inland cliffs | 65% |
| Artificial landscapes (terrestrial) | Arable land; Forestry plantations; Perennial crops, orchards and groves | 35% |
Land use
| Land-use | Extent (% of site) |
|---|---|
| agriculture | 35% |
| forestry | 55% |
| hunting | 60% |
| not utilised | 5% |
Management considerations The main threats include the enlargement of a road in one of the gorges, the growing use of poison baits, afforestation and game hunting.
Protection status National None International None
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Recommended citation BirdLife International (2013) Important Bird Areas factsheet: Oña and Tesla mountain ranges. Downloaded from http://www.birdlife.org on 21/05/2013
To provide new information to update this factsheet or to correct any errors, please email BirdLife
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