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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
Barnacle Goose Branta leucopsis	LC	non-breeding	2011-2015	21,169-32,356 individuals	A4i, B1i, C2
Greylag Goose Anser anser	LC	non-breeding	2011-2015	22,073-35,700 individuals	A4i, B1i, C3
Greater White-fronted Goose Anser albifrons	LC	non-breeding	2011-2015	30,465-35,948 individuals	B1i, C3
Northern Shoveler Spatula clypeata	LC	non-breeding	2011-2015	10,131-12,603 individuals	B1i, C3
Common Teal Anas crecca	LC	non-breeding	2011-2015	5,732-8,722 individuals	B1i, C3
Spotted Crake Porzana porzana	LC	breeding	2011-2015	14-24 breeding pairs	C6
Eurasian Spoonbill Platalea leucorodia	LC	breeding	2011-2015	95-189 breeding pairs	B1i, C2
Eurasian Spoonbill Platalea leucorodia	LC	non-breeding	2011-2015	281-410 individuals	B1i, C2
Eurasian Bittern Botaurus stellaris	LC	breeding	2011-2015	18-32 breeding pairs	C6
Great White Egret Ardea alba	LC	breeding	2011-2015	160-195 breeding pairs	C2, C6
Great White Egret Ardea alba	LC	non-breeding	2011-2015	297-368 individuals	C6
Great Cormorant Phalacrocorax carbo	LC	breeding	2011-2015	2,435-3,115 breeding pairs	B1i, C3
Eurasian Golden Plover Pluvialis apricaria	LC	non-breeding	2011-2015	6,813-11,100 individuals	C6
Eurasian Golden Plover Pluvialis apricaria	LC	winter	2011-2015	3,803 individuals	B3
Osprey Pandion haliaetus	LC	non-breeding	2011-2015	4 individuals	C6
Western Marsh-harrier Circus aeruginosus	LC	breeding	2011-2015	62-68 breeding pairs	C6
White-tailed Sea-eagle Haliaeetus albicilla	LC	breeding	2011-2015	1 breeding pairs	C6
White-tailed Sea-eagle Haliaeetus albicilla	LC	non-breeding	2011-2015	5 individuals	C6
Savi's Warbler Locustella luscinioides	LC	breeding	2011-2015	438-575 breeding pairs	B3
A4iii Species group - waterbirds	n/a	non-breeding	1990	100,000-499,999 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
Human intrusions and disturbance	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Residential and commercial development	past (and unlikely to return) and no longer limiting	some of area/population (10-49%)	very rapid to severe deterioration	low

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
-	Oostvaardersplassen	Nature Reserve	100
1989	Oostvaardersplassen	Ramsar Site, Wetland of International Importance	100
2000	Oostvaardersplassen	Special Protection Area (Birds Directive)	100
2010	Oostvaardersplassen	Natuurbeschermingswet	100

Habitat1	Habitat detail	% of IBA
Marine Coastal/Supratidal		69
Artificial/Terrestrial	Ruderal land	23
Forest	Broadleaved deciduous woodland, Alluvial and very wet forest	8

1. IUCN Habitat classification.

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 23/11/2024.