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Location Switzerland, Graubünden
Central coordinates 9o 19.00' East  46o 44.00' North
IBA criteria A3, B2, B3
Area 28,894 ha
Altitude 600 - 2,880m
Year of IBA assessment 2000

SVS/BirdLife Switzerland



Summary The IBA consists of central alpine valleys, with forests and traditional agricultural landscapes, and mountainous regions. An important site for species associated with subalpine habitats, including Black Grouse, Green Woodpecker and Ring Ouzel. The main threat is abandonment of traditional agriculture.

Site description Das IBA umfasst die Heinzenberg-Region, das zentralalpine Tal des Domleschg (Hinterrhein von Thusis bis Bonaduz), das Vorderrheintal von Ilanz bis Bonaduz und das Safiental. Der Heinzenberg besitzt einen nach Osten gerichteten flachen Berghang mit ausgedehnten mageren bis nährstoffreichen Mähwiesen, in die mosaikartig Flachmoore und subalpiner Fichtenwald eingestreut sind. Die alpine Stufe ist nur entlang des Grates kleinräumig ausgeprägt. Kleine Dörfer, Bauernhöfe und Alphütten prägen die Landschaft. Das Domleschg ist eine Kulturlandschaft und ausserordentlich reich an unterschiedlichen Lebensraumtypen und Strukturen: Felsensteppen, artenreiche Wiesen, Obstgärten, Hecken, Trockenmauern, Ackerterrassen u.a. Hingegen hat es im Talgrund auch intensiv bewirtschaftete Wiesen und mehrere Ortschaften. Grössere Auengebiete mit Waldföhre bestehen bei Castrisch und Rhäzüns – Bonaduz entlang des Hinterrheins. Das Safiental besitzt steile Bergflanken, was nur traditionelle Alpwirtschaft erlaubt. In den unteren Lagen dominiert subalpiner Wald, der jedoch zugunsten von Weide und Wiese teilweise weit geöffnet ist. Oberhalb bedecken alpine Rasengesellschaften auf Silikat die Hänge und grössere Felskomplexe finden sich beim Piz Signina.

Key Biodiversity In den strauch- und heckendurchsetzten Heuwiesen des Heinzenbergs erreichen Braunkehlchen und Dorngrasmücke verhältnismässig hohe Dichten. Daneben singen auch Wachtel und Feldlerche in dieser Kulturlandschaft. In den Wäldern brüten Grünspecht und Ringdrossel in grosser Zahl. Im Domleschg sind Kulturlandarten wie Neuntöter, Wendehals, Gartenrotschwanz und Grünspecht recht häufig, an wenigen Orten kommen Wiedehopf, Schwarzkehlchen und Zaunammer vor. Im Safiental brüten subalpine Vogelarten in grösserer Dichte: Birkhuhn, Grünspecht, Ringdrossel und Zitronengirlitz. Dazu kommen weitere typische Brutvögel des Bergwaldes und der alpinen Stufe.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Black Grouse Lyrurus tetrix resident  1996  100-200 breeding pairs  medium  B2  Least Concern 
Rock Partridge Alectoris graeca resident  1996  40-70 breeding pairs  B2  Near Threatened 
Golden Eagle Aquila chrysaetos resident  1996  9 breeding pairs  B2  Least Concern 
Picoides tridactylus resident  1996  15-40 breeding pairs  medium  B2  Not Recognised 
Eurasian Wryneck Jynx torquilla breeding  1996  25-60 breeding pairs  B2  Least Concern 
Picus viridis resident  1996  150 breeding pairs  medium  B2  Not Recognised 
Yellow-billed Chough Pyrrhocorax graculus resident  1996  100-200 breeding pairs  A3  Least Concern 
Wallcreeper Tichodroma muraria resident  1996  present  A3  Least Concern 
Ring Ouzel Turdus torquatus breeding  1996  500-1,000 breeding pairs  B3  Least Concern 
Rufous-tailed Rock-thrush Monticola saxatilis breeding  1996  5-25 breeding pairs  B2  Least Concern 
White-winged Snowfinch Montifringilla nivalis resident  1996  40-60 breeding pairs  A3  Least Concern 
Alpine Accentor Prunella collaris resident  1996  75-150 breeding pairs  A3  Least Concern 
Alpine Citril Finch Carduelis citrinella breeding  1996  150 breeding pairs  A3  Least Concern 

IBA Monitoring

2009 low not assessed negligible
unset
Medium - based upon reliable but incomplete / partially representative data

Agricultural expansion and intensification livestock farming and ranching (includes forest grazing) - small-holder grazing, ranching or farming happening now some of area/population (10-49%) no or imperceptible deterioration low
Agricultural expansion and intensification wood and pulp plantations (includes afforestation) - small-holder plantations likely in short term (within 4 years) some of area/population (10-49%) no or imperceptible deterioration low
Climate change and severe weather habitat shifting and alteration likely in long term (beyond 4 years) whole area/population (>90%) no or imperceptible deterioration low
Human intrusions and disturbance recreational activities happening now majority/most of area/population (50-90%) no or imperceptible deterioration low
Invasive and other problematic species and genes invasive non-native/alien species/diseases - unspecified species happening now small area/few individuals (<10%) no or imperceptible deterioration low
Natural system modifications other ecosystem modifications happening now some of area/population (10-49%) no or imperceptible deterioration low
Over-exploitation, persecution and control of species hunting & collecting terrestrial animals - intentional use (species being assessed is the target) happening now majority/most of area/population (50-90%) no or imperceptible deterioration low
Residential and commercial development commercial and industrial development happening now some of area/population (10-49%) no or imperceptible deterioration low
Residential and commercial development housing and urban areas happening now some of area/population (10-49%) no or imperceptible deterioration low
Residential and commercial development tourism and recreation areas likely in long term (beyond 4 years) small area/few individuals (<10%) no or imperceptible deterioration low
Transportation and service corridors roads and railroads happening now small area/few individuals (<10%) no or imperceptible deterioration low

Some of site covered (10-49%)  No management planning has taken place  Very little or no conservation action taking place  negligible 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Auenlandschaft am Unterlauf des Hinterrheins Landscapes and Natural Monuments of National Importance 303 protected area contained by site 303  
Beverin Federal Hunting Reserves 4,210 protected area overlaps with site 532  
Cauma Floodplains of National Importance 89 protected area overlaps with site 62  
Cumparduns Floodplains of National Importance 14 protected area contained by site 14  
Cuolm Sura 2 Fenlands of National Importance 5 protected area contained by site 5  
Glaspass Fenlands of National Importance 4 protected area contained by site 4  
Isla Sut Fenlands of National Importance 3 protected area contained by site 3  
Pascuminer See / Bischolsee Raised and Transitional Bogs of National Importance 4 protected area contained by site 4  
Quadras Fenlands of National Importance 3 protected area is adjacent to site 0  
Rhaezuenser Rheinauen Floodplains of National Importance 157 protected area contained by site 157  
Ruinaulta Landscapes and Natural Monuments of National Importance 2,028 protected area contained by site 2,028  
Salignas / Combras Fenlands of National Importance 41 protected area contained by site 41  
Trockengebiet im unteren Domleschg Landscapes and Natural Monuments of National Importance 335 protected area contained by site 335  
Weihermühle Fenlands of National Importance 4 protected area contained by site 4  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Forest Alluvial and very wet forest; Mixed woodland; Native coniferous woodland; Treeline ecotone  41%
Grassland Alpine, subalpine and boreal grassland  35%
Artificial - terrestrial Other urban and industrial areas; Urban parks and gardens  4%
Rocky areas Inland cliffs; Scree & boulders  14%
Wetlands (inland) Fens, transition mires and springs; Rivers and streams; Standing freshwater  -

Land use

Land-use Extent (% of site)
agriculture 35%
forestry -
tourism/recreation -
urban/industrial/transport 4%

Protection status BLN-Landschaften: Auenlandschaft am Unterlauf des Hinterrheins: vollständig im IBA; Ruinaulta: vollständig im IBA; Trockengebiet im unteren Domleschg: vollständig im IBA; Flachmoore: 6 Objekte: 5 ganz im IBA; Hochmoore: 1 Objekt: vollständig im IBA; Auengebiete: Cauma: grösstenteils im IBA; Cumparduns: vollständig im IBA; Rhäzünser Rheinauen: vollständig im IBA; Jagdbanngebiete: Beverin: teilweise im IBA;

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Heinzenberg mountain and surrounding valleys. Downloaded from http://www.birdlife.org on 27/12/2014

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