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Location Denmark, Storstrøms Amtskommune
Central coordinates 12o 0.00' East  54o 55.00' North
IBA criteria A4i, A4iii, B1i, C2, C3, C4
Area 8,160 ha
Altitude 0 - 11m
Year of IBA assessment 2000

Dansk Ornitologisk Forening

Site description A shallow sea area with shoals, banks and islands surrounded by saltmarsh and agricultural land.

Key Biodiversity Population data are incomplete but numbers of wintering birds appear to be lower than in 1983 when the site was designated as a Special Protection Area. It is possible that very high numbers only occur in harsh winters, when several more species meet the A4i criterion, and the total number of waterbirds exceeds 20,000 individuals. Sterna hirundo and Sterna paradisaea, 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
Mute Swan Cygnus olor winter  1994  4,200 individuals  medium  A4i, B1i, C3  Least Concern 
Whooper Swan Cygnus cygnus non-breeding  1994  143 individuals  medium  B1i, C2  Least Concern 
Tufted Duck Aythya fuligula non-breeding  1994  6,880 individuals  B1i, C3  Least Concern 
A4iii Species group - waterbirds non-breeding  1994  20,000 individuals  unknown  A4iii, C4   

IBA Monitoring

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

Haliaeetus albicilla White-tailed Sea-eagle 1 1 breeding pairs 100 favourable

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Ulvsund, Gr Baltic Sea Protected Area (Helcom) 32,887 protected area overlaps with site 7,864  


IUCN habitat Habitat detail Extent (% of site)
Coastline Salt marshes  10%
Sea Sea inlets and coastal features  90%

Land use

Land-use Extent (% of site)
unknown 100%

Protection status National None International High8,160 ha of IBA covered by Special Protection Area (Ulvsund and Grønsund, 8,160 ha).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Ulvsund, Grønsund, Farø Fjord and Fanefjord. Downloaded from on 23/10/2016

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