De Wieden

IBA Justification

The site was identified as important in 2016 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species'):
Species Current IUCN Red List Category Season Year(s) Population estimate at site IBA criteria met
Greater White-fronted Goose Anser albifrons LC non-breeding 2011-2015 17,728-27,241 individuals B1i, C3
Common Pochard Aythya ferina VU breeding 2011-2015 21-34 breeding pairs A1, B2, C1
Spotted Crake Porzana porzana LC breeding 2011-2015 15-20 breeding pairs C6
Baillon's Crake Zapornia pusilla LC breeding 2011-2015 2-3 breeding pairs C6
White Stork Ciconia ciconia LC breeding 2009-2014 18 breeding pairs C6
Eurasian Spoonbill Platalea leucorodia LC breeding 2009-2014 72 breeding pairs B1i
Eurasian Bittern Botaurus stellaris LC breeding 2011-2015 20-28 breeding pairs C6
Purple Heron Ardea purpurea LC breeding 2011-2015 101-117 breeding pairs C6
Great White Egret Ardea alba LC breeding 2011-2015 3-6 breeding pairs C6
Black Tern Chlidonias niger LC breeding 2011-2015 140-187 breeding pairs C6
Short-eared Owl Asio flammeus LC breeding 2011-2015 1-3 breeding pairs C6
Sedge Warbler Acrocephalus schoenobaenus LC breeding 2011-2015 3,278-4,701 breeding pairs B3
Savi's Warbler Locustella luscinioides LC breeding 2011-2015 339-548 breeding pairs B3
A4iii Species group - waterbirds n/a non-breeding 2011-2015 32,898-48,966 individuals A4iii, C4

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2016).

IBA Conservation

IBA conservation assessment
Year of assessment (most recent) State (condition) Pressure (threat) Response (action)
2017 unfavourable not assessed low
Was the whole site assessed? State assessed by Accuracy of information
yes population good

State (condition of the trigger species' populations)
Scientific name Common name Reference population Actual population Units % of population remaining Result
Anser albifrons Greater White-fronted Goose 3800 15514 individuals 100 favourable
Porzana porzana Spotted Crake 19 15 breeding pairs 79 near favourable
Botaurus stellaris Eurasian Bittern 30 20 breeding pairs 67 unfavourable
Ardea purpurea Purple Heron 65 101 breeding pairs 100 favourable
Chlidonias niger Black Tern 200 140 breeding pairs 70 near favourable
Acrocephalus schoenobaenus Sedge Warbler 2000 3278 breeding pairs 100 favourable
Locustella luscinioides Savi's Warbler 300 339 breeding pairs 100 favourable

Response (conservation actions taken for the trigger species and/or their habitats)
Protected-area designation Management planning Other conservation action Result
Whole area of site (>90%) covered by appropriate conservation designation A management plan exists but it is out of date or not comprehensive Unknown low
For more information about IBA conservation status, please click here

IBA Protection

Protected area (PA) PA designation PA area (ha) Relationship of PA with IBA Overlap of PA with IBA (ha)
Zwarte Meer Ramsar Site, Wetland of International Importance 2,050 protected area is adjacent to site 0
Weerribben-Wieden Nationaal Park 10,270 protected area overlaps with site 0
De Wieden II Nature Reserve 285 protected area contained by site 285
De Wieden Ramsar Site, Wetland of International Importance 9,400 protected area overlaps with site 9,400
De Wieden Natuurbeschermingswet 9,018 is identical to site 0
De Wieden Nature Reserve with Management Subsidy 4,216 protected area contained by site 4,991
De Wieden Site of Community Importance (Habitats Directive) 7,156 protected area contained by site 7,534
De Wieden Special Protection Area (Birds Directive) 9,018 is identical to site 9,320


Habitat (IUCN level 1) Habitat detail Extent (% of site)
Forest Alluvial and very wet forest -
Wetlands (inland) Standing freshwater, Water fringe vegetation -
Artificial/Terrestrial Highly improved re-seeded landscapes -
For more information about the IUCN Habitat classification, please click here.

Land use

Land-use Extent (% of site)
agriculture -
other -
fisheries/aquaculture -
water management -
nature conservation and research -
tourism/recreation -

Recommended citation
BirdLife International (2024) Important Bird Area factsheet: De Wieden. Downloaded from on 26/02/2024.