Data Zone
The site was identified as internationally important for bird conservation in 2000 because it was regularly supporting significant populations of the species listed below, meeting IBA criteria.
Populations meeting IBA criteria ('key species') at the site:| Species | Red List | Season (year/s of estimate) | 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 |
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.
| IBA conservation status | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2010 | very unfavourable | high | low |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | population | good | |
| State (condition of the key species' populations) | |||||
|---|---|---|---|---|---|
| Species | Actual vs Reference (units) | % remaining | Result | ||
| Tundra Swan Cygnus columbianus | 125 / 4,320 (individuals) | 3 | very unfavourable | ||
| Brent Goose Branta bernicla | 1,635 / 2,154 (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 | 3,011 / 3,500 (individuals) | 87 | near favourable | ||
| Eurasian Coot Fulica atra | 6,000 / 42,000 (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 | 0 / 3 (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 | 4 / 11 (individuals) | 37 | very unfavourable | ||
| Pressure (threats to the key species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Pollution | happening now | most of population/area (50–90%) | slow deterioration (1–10% over 3 generations) | high |
| Invasive and other problematic species and genes | happening now | some of population/area (10–49%) | slow deterioration (1–10% over 3 generations) | medium |
| Natural system modifications | happening now | few individuals/small area (<10%) | no deterioration (<1% over 3 generations) | low |
| Transportation and service corridors | likely in short term (within 4 years) | whole population/area (>90%) | no deterioration (<1% over 3 generations) | low |
| Response (conservation actions taken for the key species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | 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 (management category) | % coverage of IBA |
|---|---|---|---|
| - | Ulvedybet | Game Reserve (-) | - |
| 1992 | Aalborg Kommune | §3 beskyttet natur (alle søer, moser, vandløb, heder, enge mv) (IV) | 1 |
| 2006 | Sebbersund, handels-, håndværksplads, kirke | Fredet ved afgørelse, exl. Kirkeomgivelser (V) | <1 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Grassland | 15 | Humid grasslands |
| Marine Coastal/Supratidal | major (>10) | |
| Marine Intertidal | major (>10) | |
| Marine Neritic | major (>10) |
| Land use | % of IBA |
|---|---|
| unknown | - |
Recommended citation
BirdLife International (2025) Important Bird Area factsheet: Ulvedybet and Nibe Bredning (Denmark). Downloaded from
https://datazone.birdlife.org/site/factsheet/ulvedybet-and-nibe-bredning-iba-denmark on 17/01/2025.