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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
Barnacle Goose Branta leucopsis	LC	non-breeding (2011–2015)	21,169–32,356 birds	A4i, B1i, C2
Greylag Goose Anser anser	LC	non-breeding (2011–2015)	22,073–35,700 birds	A4i, B1i, C3
Greater White-fronted Goose Anser albifrons	LC	non-breeding (2011–2015)	30,465–35,948 birds	B1i, C3
Northern Shoveler Spatula clypeata	LC	non-breeding (2011–2015)	10,131–12,603 birds	B1i, C3
Common Teal Anas crecca	LC	non-breeding (2011–2015)	5,732–8,722 birds	B1i, C3
Spotted Crake Porzana porzana	LC	breeding (2011–2015)	14–24 pairs	C6
Eurasian Spoonbill Platalea leucorodia	LC	breeding (2011–2015)	95–189 pairs	B1i, C2
Eurasian Spoonbill Platalea leucorodia	LC	non-breeding (2011–2015)	281–410 birds	B1i, C2
Eurasian Bittern Botaurus stellaris	LC	breeding (2011–2015)	18–32 pairs	C6
Great White Egret Ardea alba	LC	breeding (2011–2015)	160–195 pairs	C2, C6
Great White Egret Ardea alba	LC	non-breeding (2011–2015)	297–368 birds	C6
Great Cormorant Phalacrocorax carbo	LC	breeding (2011–2015)	2,435–3,115 pairs	B1i, C3
Eurasian Golden Plover Pluvialis apricaria	LC	non-breeding (2011–2015)	6,813–11,100 birds	C6
Eurasian Golden Plover Pluvialis apricaria	LC	winter (2011–2015)	3,803 birds	B3
Osprey Pandion haliaetus	LC	non-breeding (2011–2015)	4 birds	C6
Western Marsh-harrier Circus aeruginosus	LC	breeding (2011–2015)	62–68 pairs	C6
White-tailed Sea-eagle Haliaeetus albicilla	LC	breeding (2011–2015)	1 pairs	C6
White-tailed Sea-eagle Haliaeetus albicilla	LC	non-breeding (2011–2015)	5 birds	C6
Savi's Warbler Locustella luscinioides	LC	breeding (2011–2015)	438–575 pairs	B3
A4iii Species group - waterbirds	n/a	non-breeding (1990)	100,000-499,999 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
Human intrusions and disturbance	happe­ning now	some of popul­ation/area (10–49%)	slow decline (1–10% over 3 gener­ations)	medium
Residential and commercial development	likely in short term (<4 years)	some of popul­ation/area (10–49%)	moderate decline (10–30% over 3 gener­ations)	medium

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
-	Oostvaardersplassen	Nature Reserve (-)	100
2010	Oostvaardersplassen	Natuurbeschermingswet (IV)	100

Habitat	% of IBA	Habitat detail
Marine Coastal/Supratidal	69
Artificial/Terrestrial	23	Ruderal land
Forest	8	Broadleaved deciduous woodland; Alluvial and very wet forest

Land use	% of IBA
water management	100
nature conservation and research	100

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