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Location Denmark, Århus Amtskommune
Central coordinates 10o 10.00' East  56o 39.00' North
IBA criteria A4i, A4iii, B1i, B3, C2, C3, C4, C6
Area 7,500 ha
Altitude 0 - 5m
Year of IBA assessment 2000

Dansk Ornitologisk Forening

Site description Shallow fjords with small islets, saltmarshes and cultivated land including large reclaimed areas near Overgaard. Marine areas surrounding this IBA (and previously included within it, following Grimmett and Jones 1989) are now included in Northern Kattegat (site 119).

Key Biodiversity The site is of high importance for wintering Cygnus cygnus. Many bird populations are shared with Northern Kattegat (IBA 119). Recurvirostra avosetta, Sterna hirundo and S. paradisaea, all listed on Annex I of the EC Birds Directive, breed at the site.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Brent Goose Branta bernicla non-breeding  1994  3,500 individuals  good  A4i, B1i, C3  Least Concern 
Whooper Swan Cygnus cygnus winter  1995  2,000 individuals  medium  A4i, B1i, B3, C2, C6  Least Concern 
Common Shelduck Tadorna tadorna non-breeding  1994  5,470-5,670 individuals  medium  A4i, B1i, C3  Least Concern 

IBA Monitoring

2010 not assessed very unfavourable not assessed
Good - based on reliable and complete / representative data

Branta leucopsis Barnacle Goose 3500 84 individuals 3 very unfavourable
Cygnus columbianus Tundra Swan 97 5 individuals 6 very unfavourable
Aythya marila Greater Scaup 11600 5000 individuals 44 unfavourable
Melanitta nigra 54000 5300 individuals 10 very unfavourable
Melanitta fusca 20000 1000 individuals 5 very unfavourable
Bucephala clangula Common Goldeneye 4000 2500 individuals 63 unfavourable
Phalacrocorax carbo Great Cormorant 5000 5000 individuals 100 favourable
Pluvialis apricaria Eurasian Golden Plover 19060 19060 individuals 100 favourable
Larus ridibundus Black-headed Gull 17600 17600 individuals 100 favourable
Thalasseus sandvicensis Sandwich Tern 173 173 breeding pairs 100 favourable
Lanius collurio Red-backed Shrike 2 2 breeding pairs 100 favourable

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Randers and Mariager Fjords and the adjacent sea Wetlands of International Importance (Ramsar) 39,040 protected area contains site 7,500  


IUCN habitat Habitat detail Extent (% of site)
Forest   15%
Wetlands (inland) Tidal rivers and enclosed tidal waters  35%
Artificial - terrestrial Arable land  50%

Land use

Land-use Extent (% of site)
agriculture -

Protection status National Low International High7,500 ha of IBA covered by Special Protection Area (Randers and Mariager Fjord and ålborg Bugt, 39,040 ha). 7,500 ha of IBA covered by Ramsar Site (Randers and Mariager Fjords and adjacent coastal waters, 41,440 ha).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Parts of Randers and Mariager Fjords. Downloaded from on 22/10/2016

To provide new information to update this factsheet or to correct any errors, please email BirdLife