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The site was identified as important in 2000 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species') at the site:

Species	Red List1	Season	Year(s)	Size	IBA criteria
Whooper Swan Cygnus cygnus	LC	winter	1995	4,086 individuals	A4i, B1i, C2
Tundra Swan Cygnus columbianus	LC	non-breeding	1994	4,320 individuals	A4i, B1i, B2, C2, C6
Eurasian Wigeon Mareca penelope	LC	non-breeding	1993	26,650 individuals	B1i, C3
Pied Avocet Recurvirostra avosetta	LC	breeding	1993	156 breeding pairs	B3
Eurasian Golden Plover Pluvialis apricaria	LC	non-breeding	1993	14,000 individuals	B1i, C2
Mew Gull Larus canus	LC	breeding	1996	2,210-5,000 breeding pairs	B2
A4iii Species group - waterbirds	n/a	winter	1993-1995	20,000-49,999 individuals	A4iii, C4

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2000) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2000. The most recent assessment (2010) is shown below.

State (condition of the trigger species' populations)
Species	Reference	Actual	Units	% remaining	Result
Tundra Swan Cygnus columbianus	4,320	125	individuals	3	very unfavourable
Brent Goose Branta bernicla	2,154	1,635	individuals	76	near favourable
Greylag Goose Anser anser	3,000	3,000	individuals	100	favourable
Pink-footed Goose Anser brachyrhynchus	9,550	9,550	individuals	100	favourable
Common Goldeneye Bucephala clangula	3,500	3,011	individuals	87	near favourable
Eurasian Coot Fulica atra	42,000	6,000	individuals	15	very unfavourable
Eurasian Spoonbill Platalea leucorodia	18	18	breeding pairs	100	favourable
Eurasian Bittern Botaurus stellaris	2	2	breeding pairs	100	favourable
Little Tern Sternula albifrons	3	0	breeding pairs	0	very unfavourable
Western Marsh-harrier Circus aeruginosus	5	5	breeding pairs	100	favourable
Montagu's Harrier Circus pygargus	2	2	breeding pairs	100	favourable
Circus cyaneus	11	4	individuals	37	very unfavourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Pollution	happening now	majority/most of area/population (50-90%)	slow but significant deterioration	high
Invasive and other problematic species and genes	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Transportation and service corridors	likely in short term (within 4 years)	whole area/population (>90%)	no or imperceptible deterioration	low
Natural system modifications	happening now	small area/few individuals (<10%)	no or imperceptible deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Whole area of site (>90%) covered by appropriate conservation designation	No management plan exists but the management planning process has begun	Some limited conservation initiatives are in place	low

Year	Protected Area	Designation	% overlap with IBA
-	Ulvedybet	Game Reserve	-
1977	Ulvedybet and Nibe Bredning	Ramsar Site, Wetland of International Importance	100
1983	Ulvedybet og Nibe Bredning	Special Protection Area (Birds Directive)	98
1992	Aalborg Kommune	§3 beskyttet natur (alle søer, moser, vandløb, heder, enge mv)	1
1998	Nibe Bredning; Halkær Ådal og Sønderup Ådal	Site of Community Importance (Habitats Directive)	91
2006	Sebbersund, handels-, håndværksplads, kirke	Fredet ved afgørelse, exl. Kirkeomgivelser	<1

Habitat1	Habitat detail	% of IBA
Grassland	Humid grasslands	15
Marine Coastal/Supratidal		major (>10)
Marine Intertidal		major (>10)
Marine Neritic		major (>10)

1. IUCN Habitat classification.

Land use	% of IBA
unknown	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Ulvedybet and Nibe Bredning (Denmark). Downloaded from https://datazone.birdlife.org/site/factsheet/ulvedybet-and-nibe-bredning-iba-denmark on 22/11/2024.