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Location Denmark
Central coordinates 11o 0.00' East  57o 0.00' North
IBA criteria A4i, A4ii, A4iii, B1i, B1ii, B2, B3, C2, C3, C4
Area 870,000 ha
Altitude
Year of IBA assessment 2000

Dansk Ornitologisk Forening



Site description A shallow sea area with a sandy bay, estuaries and a mosaic of hard-bottom banks. The area given here is of the Danish part only; 180,000 ha (17% of the total transboundary area) are within Swedish territory.

Key Biodiversity This is an exceptionally important area for wintering seaduck and pelagic species (divers and auks), with hundreds of thousands of birds wintering at the site. Seaduck are mainly within Danish waters and the pelagic species mainly in the Swedish part. This is the most important wintering area in north-west Europe for Somateria mollissima (>13% of the north-west European population), Melanitta nigra (>38% of the north-west European population) and Alca torda (>10% of the north-west European population).

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Greater Scaup Aythya marila winter  1993  12,000 individuals  good  A4i, B1i, B2, C3  Least Concern 
Common Eider Somateria mollissima winter  1993  400,000 individuals  good  A4i, B1i, C3  Least Concern 
Melanitta nigra winter  1993  495,000 individuals  good  A4i, B1i, C3  Not Recognised 
Melanitta fusca winter  1993  82,000 individuals  good  A4i, B1i, B2, C3  Not Recognised 
Common Goldeneye Bucephala clangula winter  1993  6,425 individuals  good  A4i, B1i, C3  Least Concern 
Arctic Loon Gavia arctica winter  1993  1,450 individuals  good  A4i, B1i, C2  Least Concern 
Red-throated Loon Gavia stellata winter  1993  1,450 individuals  good  A4i, B1i, C2  Least Concern 
Red-necked Grebe Podiceps grisegena winter  1993  2,350 individuals  good  A4i, B1i, C3  Least Concern 
Larus argentatus winter  1993  30,000 individuals  good  A4i, B1i  Not Recognised 
Great Black-backed Gull Larus marinus winter  1993  6,350 individuals  good  A4i, B1i, C3  Least Concern 
Razorbill Alca torda winter  1993  129,000 individuals  good  A4ii, B1ii, B3, C3  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Hirsholmene Scientific Reserve 2,095 unknown 0  
Hirsholmene Wetlands of International Importance (Ramsar) 374 protected area contained by site 480  
Hirsholmene Bird R Bird Reserve 380 unknown 0  
Hirsholmene Sea Area Major Conservation Area 920 protected area contained by site 920  
L'sí National Nature Area 98,300 unknown 0  
Laesoe Wetlands of International Importance (Ramsar) 66,380 protected area overlaps with site 62,880  
Randers and Mariager Fjords and the adjacent sea Wetlands of International Importance (Ramsar) 39,040 protected area overlaps with site 35,200  
Waters north of Anholt Wetlands of International Importance (Ramsar) 12,720 protected area overlaps with site 12,635  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Sea Open Sea  100%

Land use

Land-use Extent (% of site)
unknown -

Protection status National Partial International High12,635 ha of IBA covered by Ramsar Site (Anholt Island (waters north of), 12,720 ha). 480 ha of IBA covered by Ramsar Site (Hirsholmene, 480 ha). 62,880 ha of IBA covered by Ramsar Site (Læsø, 67,840 ha). 2,923 ha of IBA covered by Ramsar Site (Nordre Ronner, 2,923 ha). 35,200 ha of IBA covered by Ramsar Site (Randers and Mariager Fjords and adjacent coastal waters, 41,440 ha). 3,740 ha of IBA covered by Special Protection Area (Hirsholmene, 3,740 ha). 2,920 ha of IBA covered by Special Protection Area (Nordre Rønner, 2,920 ha). 35,200 ha of IBA covered by Special Protection Area (Randers and Mariager Fjord and ålborg Bugt, 39,040 ha). 11,520 ha of IBA covered by Special Protection Area (Sea area north of Anholt, 11,520 ha). 62,880 ha of IBA covered by Special Protection Area (South Læsø and adjacent sea, 66,380 ha). 21,500 ha of IBA covered by Special Protection Area (ålborg Bugt, 31,460 ha).

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Recommended citation  BirdLife International (2015) Important Bird Areas factsheet: Northern Kattegat. Downloaded from http://www.birdlife.org on 02/09/2015

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