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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') at the site:

Species	Red List1	Season	Year(s)	Size	IBA criteria
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
Eurasian 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

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2016) may differ.

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 area/population (>90%)	very rapid to severe deterioration	very high
Human intrusions and disturbance	happening now	whole area/population (>90%)	very rapid to severe deterioration	very high
Energy production and mining	likely in short term (within 4 years)	whole area/population (>90%)	very rapid to severe deterioration	very high

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	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	% overlap with IBA
1998	Grevelingen	Site of Community Importance (Habitats Directive)	100
2000	Grevelingen	Special Protection Area (Birds Directive)	100
2000	Grevelingen	Ramsar Site, Wetland of International Importance	100
2002	Grevelingen	Natuurbeschermingswet	100

Habitat1	Habitat detail	% of IBA
Marine Coastal/Supratidal		80
Artificial/Terrestrial	Highly improved re-seeded landscapes	20

1. IUCN Habitat classification.

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 22/11/2024.