|Central coordinates||14o 15.00' East 45o 51.00' North|
|IBA criteria||B3, C6|
|Altitude||440 - 453m|
|Year of IBA assessment||2011|
Site description Planinsko polje is part of the karst basin of the Ljubljanica river, and displays typical karst features such as caves (more than 100 in the vicinity) and sink-holes. Higher hills surround the IBA, from where water collects and sinks underground. Floods periodically cover about 16 km2 of the area. Besides the numerous small streams, the Unica river with its beautiful meanders is the main water-body at the site. Arable land and human settlements occur at the outermost, higher edges of the site. Land-use is mainly mowing of grass and hay; some farmers use fertilizer to increase grass production. This has been a classic area for karst research since the 17th century.
Key Biodiversity An important site for breeding Crex crex. Other wet meadow and grassland bird species breed at the site in nationally important numbers, including many SPECs. Significant proportion (³1%) of national population breeding at site: Alcedo atthis (2-5 pairs). The site is known to support notable numbers of birds on migration as well.
|Species||Season||Period||Population estimate||Quality of estimate||IBA Criteria||IUCN Category|
|Corncrake Crex crex||breeding||1992-2002||30-40 breeding pairs||-||C6||Least Concern|
|Barred Warbler Sylvia nisoria||breeding||2008||55-90 breeding pairs||-||B3, C6||Least Concern|
|Protected area||Designation||Area (ha)||Relationship with IBA||Overlap with IBA (ha)|
|Notranjski trikotnik - SI3000232||Habitats Directive||15,202||protected area contains site||1,600|
|Planina - Planinsko polje||Landscape Park||613||protected area contained by site||960|
|Planinsko polje - SI5000016||Birds Directive||1,042||protected area contained by site||1,042|
|Trnovski gozd - Nanos - SI3000255||Habitats Directive||52,636||protected area is adjacent to site||0|
|IUCN habitat||Habitat detail||Extent (% of site)|
|Forest||Broadleaved deciduous woodland||5%|
|Grassland||Humid grasslands; Mesophile grasslands; Steppes and dry calcareous grassland||70%|
|Wetlands (inland)||Rivers and streams; Water fringe vegetation||15%|
|Caves and subterranean habitats (non-aquatic)||Caves||-|
|Artificial - terrestrial||Highly improved re-seeded landscapes||5%|
|Land-use||Extent (% of site)|
|nature conservation and research||5%|
Protection status National Partial International None960 ha of IBA covered by Landscape Park (Krajinski park Planinsko polje, 960 ha).
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Recommended citation BirdLife International (2015) Important Bird Areas factsheet: Planina polje. Downloaded from http://www.birdlife.org on 31/01/2015
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