|Central coordinates||11o 0.00' East 57o 0.00' North|
|IBA criteria||A4i, A4ii, A4iii, B1i, B1ii, B2, B3, C2, C3, C4|
|Year of IBA assessment||2000|
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).
|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||Near Threatened|
|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||Near Threatened|
|Protected area||Designation||Area (ha)||Relationship with IBA||Overlap with IBA (ha)|
|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|
|IUCN habitat||Habitat detail||Extent (% of site)|
|Land-use||Extent (% of site)|
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 (2016) Important Bird and Biodiversity Area factsheet: Northern Kattegat. Downloaded from http://www.birdlife.org on 06/05/2016
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