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Location Denmark, Nordjyllands Amtskommune
Central coordinates 9o 35.00' East  57o 2.00' North
IBA criteria A4i, A4iii, B1i, B2, B3, C2, C3, C4, C6
Area 18,530 ha
Altitude 0 - 10m
Year of IBA assessment 2000

Dansk Ornitologisk Forening

Site description A coastal site including shallow fjord areas, saltmarshes, reedbeds, small freshwater lakes and agricultural land. The Ulvedybet area is a brackish lake that has been dammed-off from the Limfjord.

Key Biodiversity The site holds more than 20,000 waterfowl and is particularly important for wintering Cygnus cygnus. Several species listed on Annex I of the Birds Directive breed at the site including Platalea leucorodia, Circus aeruginosus, Recurvirostra avosetta, Philomachus pugnax, Sterna sandvicensis, S. hirundo, S. paradisaea and S. albifrons.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Whooper Swan Cygnus cygnus winter  1995  4,086 individuals  medium  A4i, B1i, C2  Least Concern 
Tundra Swan Cygnus columbianus non-breeding  1994  4,320 individuals  good  A4i, B1i, B2, C2, C6  Least Concern 
Eurasian Wigeon Mareca penelope non-breeding  1993  26,650 individuals  good  B1i, C3  Least Concern 
Pied Avocet Recurvirostra avosetta breeding  1993  156 breeding pairs  good  B3  Least Concern 
Eurasian Golden Plover Pluvialis apricaria non-breeding  1993  14,000 individuals  B1i, C2  Least Concern 
Mew Gull Larus canus breeding  1996  2,210-5,000 breeding pairs  B2  Least Concern 
A4iii Species group - waterbirds winter  1993-1995  20,000-49,999 individuals  unknown  A4iii, C4   

IBA Monitoring

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

Anser brachyrhynchus Pink-footed Goose 9550 9550 individuals 100 favourable
Anser anser Greylag Goose 3000 3000 individuals 100 favourable
Branta bernicla Brent Goose 2154 1635 individuals 76 near favourable
Cygnus columbianus Tundra Swan 4320 125 individuals 3 very unfavourable
Bucephala clangula Common Goldeneye 3500 3011 individuals 87 near favourable
Platalea leucorodia Eurasian Spoonbill 18 18 breeding pairs 100 favourable
Botaurus stellaris Eurasian Bittern 2 2 breeding pairs 100 favourable
Circus aeruginosus Western Marsh-harrier 5 5 breeding pairs 100 favourable
Circus cyaneus 11 4 individuals 37 very unfavourable
Circus pygargus Montagu's Harrier 2 2 breeding pairs 100 favourable
Fulica atra Common Coot 42000 6000 individuals 15 very unfavourable
Sternula albifrons Little Tern 3 0 breeding pairs 0 very unfavourable

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Ulvedybet Game Reserve 0 protected area contained by site 2,000  
Ulvedybet and Nibe Bredning Wetlands of International Importance (Ramsar) 18,530 is identical to site 18,530  


IUCN habitat Habitat detail Extent (% of site)
Grassland Humid grasslands  15%
Wetlands (inland) Tidal rivers and enclosed tidal waters  65%
Unknown   20%

Land use

Land-use Extent (% of site)
unknown -

Protection status National Partial International High18,530 ha of IBA covered by Ramsar Site (Ulvedybet and Nibe Bredning, 20,304 ha). 18,530 ha of IBA covered by Special Protection Area (Ulvedybet and Nibe Bredning, 18,530 ha).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Ulvedybet and Nibe Bredning. Downloaded from on 22/10/2016

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