Grevelingen This is an IBA in Danger! 

IBA Justification

Year of most recent IBA criteria assessment: 2016

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population at site IBA criteria triggered
Whooper Swan Cygnus cygnus LC winter 2011-2015 48 individuals B3
Tundra Swan Cygnus columbianus LC non-breeding 2011-2015 495 individuals B1i, C2, C6
Brent Goose Branta bernicla LC non-breeding 2011-2015 5,446-8,067 individuals B1i, C3
Barnacle Goose Branta leucopsis LC non-breeding 2011-2015 18,204-20,182 individuals A4i, B1i, C2
Red-breasted Merganser Mergus serrator LC breeding 2011-2015 26-35 breeding pairs B2
Red-breasted Merganser Mergus serrator LC non-breeding 2011-2015 5,258-6,738 individuals B1i, C3
Red-breasted Merganser Mergus serrator LC winter 2011-2015 4,730 individuals B2
Common Shelduck Tadorna tadorna LC non-breeding 2011-2015 2,953-5,369 individuals B1i, C3
Eurasian Wigeon Mareca penelope LC non-breeding 2011-2015 15,050-20,620 individuals B1i, C3
Horned Grebe Podiceps auritus VU non-breeding 2011-2015 18-31 individuals C6
Horned Grebe Podiceps auritus VU winter 2011-2015 10 individuals B2
Black-necked Grebe Podiceps nigricollis LC non-breeding 2011-2015 2,710-4,401 individuals B1i, C3
Common Coot Fulica atra LC winter 2011-2015 6,156-15,891 individuals B2
Eurasian Spoonbill Platalea leucorodia LC non-breeding 2011-2015 197-220 individuals B1i, C2
Little Egret Egretta garzetta LC non-breeding 2011-2015 37-60 individuals C6
Pied Avocet Recurvirostra avosetta LC breeding 2011-2015 225-323 breeding pairs C6
Common Ringed Plover Charadrius hiaticula LC breeding 2011-2015 17-23 breeding pairs B3
Kentish Plover Charadrius alexandrinus LC non-breeding 2011-2015 69-109 individuals C6
Kentish Plover Charadrius alexandrinus LC breeding 2011-2015 54-76 breeding pairs C6
Mew Gull Larus canus LC breeding 2011-2015 248-280 breeding pairs B3
European Herring Gull Larus argentatus LC breeding 2011-2015 2,516-3,116 breeding pairs B2
Great Black-backed Gull Larus marinus LC breeding 2011-2015 19-26 breeding pairs B3
Little Tern Sternula albifrons LC breeding 2011-2015 143-172 breeding pairs B1i, C6
Arctic Tern Sterna paradisaea LC breeding 2009-2014 min 51 breeding pairs C6
Sandwich Tern Thalasseus sandvicensis LC breeding 2011-2015 2,479-4,479 breeding pairs A4i, B1i, B3, C2, C6
Peregrine Falcon Falco peregrinus LC non-breeding 2011-2015 12-14 individuals C6
A4iii Species group - waterbirds n/a non-breeding 2011-2015 63,492-77,730 individuals A4iii, C4

Note: The current IUCN Red List category may differ from the category that was valid at the time of IBA criteria assessment.

For more information about the IBA criteria, please click here

IBA Conservation

IBA conservation status - summary
Year of assessment (most recent) Threat (pressure) Condition (state) Action (response)
2018 very high not assessed high
Was the whole site assessed? yes Condition (state) assessed by unset
Accuracy of information medium

Threats to the site (pressure)
Threat level 1 Threat level 2 Timing Scope Severity Result
Energy production and mining renewable energy likely in short term (within 4 years) whole area/population (>90%) very rapid to severe deterioration very high
Human intrusions and disturbance recreational activities happening now whole area/population (>90%) very rapid to severe deterioration very high
Residential and commercial development tourism and recreation areas happening now whole area/population (>90%) very rapid to severe deterioration very high

Conservation actions taken at the site (response)
Protected-area designation Management planning Other conservation action Result
Whole area of site (>90%) covered by appropriate conservation designation A comprehensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity high
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)
Grevelingen Site of Community Importance (Habitats Directive) 13,753 is identical to site 13,810
Grevelingen Ramsar Site, Wetland of International Importance 13,900 protected area contains site 13,900
Grevelingen Natuurbeschermingswet 13,753 is identical to site 0
Grevelingen Special Protection Area (Birds Directive) 13,753 is identical to site 13,826


IUCN Habitat Habitat detail Extent (% of site)
Wetlands (inland) Standing brackish and salt water -
Artificial/Terrestrial Highly improved re-seeded landscapes -
For further information about the IUCN habitat classification, please click here.

Land use

Land-use Extent (% of site)
fisheries/aquaculture -
water management -
hunting -
nature conservation and research -
tourism/recreation -
agriculture -
For further information about the land-use classification, please click here.

Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Grevelingen. Downloaded from on 04/06/2023.