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The site was identified as internationally important for bird conservation in 2016 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 List	Season (year/s of estimate)	Size	IBA criteria
Whooper Swan Cygnus cygnus	LC	winter (2011–2015)	48 birds	B3
Tundra Swan Cygnus columbianus	LC	non-breeding (2011–2015)	495 birds	B1i, C2, C6
Brent Goose Branta bernicla	LC	non-breeding (2011–2015)	5,446–8,067 birds	B1i, C3
Barnacle Goose Branta leucopsis	LC	non-breeding (2011–2015)	18,204–20,182 birds	A4i, B1i, C2
Red-breasted Merganser Mergus serrator	LC	breeding (2011–2015)	26–35 pairs	B2
Red-breasted Merganser Mergus serrator	LC	non-breeding (2011–2015)	5,258–6,738 birds	B1i, C3
Red-breasted Merganser Mergus serrator	LC	winter (2011–2015)	4,730 birds	B2
Common Shelduck Tadorna tadorna	LC	non-breeding (2011–2015)	2,953–5,369 birds	B1i, C3
Eurasian Wigeon Mareca penelope	LC	non-breeding (2011–2015)	15,050–20,620 birds	B1i, C3
Horned Grebe Podiceps auritus	VU	non-breeding (2011–2015)	18–31 birds	C6
Horned Grebe Podiceps auritus	VU	winter (2011–2015)	10 birds	B2
Black-necked Grebe Podiceps nigricollis	LC	non-breeding (2011–2015)	2,710–4,401 birds	B1i, C3
Eurasian Coot Fulica atra	LC	winter (2011–2015)	6,156–15,891 birds	B2
Eurasian Spoonbill Platalea leucorodia	LC	non-breeding (2011–2015)	197–220 birds	B1i, C2
Little Egret Egretta garzetta	LC	non-breeding (2011–2015)	37–60 birds	C6
Pied Avocet Recurvirostra avosetta	LC	breeding (2011–2015)	225–323 pairs	C6
Common Ringed Plover Charadrius hiaticula	LC	breeding (2011–2015)	17–23 pairs	B3
Kentish Plover Charadrius alexandrinus	LC	non-breeding (2011–2015)	69–109 birds	C6
Kentish Plover Charadrius alexandrinus	LC	breeding (2011–2015)	54–76 pairs	C6
Mew Gull Larus canus	LC	breeding (2011–2015)	248–280 pairs	B3
European Herring Gull Larus argentatus	LC	breeding (2011–2015)	2,516–3,116 pairs	B2
Great Black-backed Gull Larus marinus	LC	breeding (2011–2015)	19–26 pairs	B3
Little Tern Sternula albifrons	LC	breeding (2011–2015)	143–172 pairs	B1i, C6
Arctic Tern Sterna paradisaea	LC	breeding (2009–2014)	min 51 pairs	C6
Sandwich Tern Thalasseus sandvicensis	LC	breeding (2011–2015)	2,479–4,479 pairs	A4i, B1i, B3, C2, C6
Peregrine Falcon Falco peregrinus	LC	non-breeding (2011–2015)	12–14 birds	C6
A4iii Species group - waterbirds	n/a	non-breeding (2011–2015)	63,492–77,730 birds	A4iii, C4

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2016. The most recent assessment (2018) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Residential and commercial development	happe­ning now	whole of popul­ation/area (>90%)	rapid decline (>30% over 3 gener­ations)	very high
Human intrusions and disturbance	happe­ning now	whole of popul­ation/area (>90%)	rapid decline (>30% over 3 gener­ations)	very high
Energy production and mining	likely in short term (<4 years)	whole of popul­ation/area (>90%)	rapid decline (>30% over 3 gener­ations)	very high

Response (conservation actions taken for the trigger species and/or their habitats)
Designation	Planning	Action	Result
Whole area (>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

Year	Protected Area	Designation (management category)	% coverage of IBA
2002	Grevelingen	Natuurbeschermingswet (IV)	100

Habitat	% of IBA	Habitat detail
Marine Coastal/Supratidal	80
Artificial/Terrestrial	20	Highly improved re-seeded landscapes

Land use	% of IBA
water management	100
nature conservation and research	100
tourism/recreation	90
fisheries/aquaculture	80
hunting	20
agriculture	5

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Grevelingen (Netherlands). Downloaded from https://datazone.birdlife.org/site/factsheet/grevelingen-iba-netherlands on 23/12/2024.