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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
Northern Shoveler Spatula clypeata	LC	non-breeding (2011–2015)	689–1,330 birds	B1i, C3
Eurasian Wigeon Mareca penelope	LC	non-breeding (2011–2015)	21,597–31,870 birds	B1i, C3
Baillon's Crake Zapornia pusilla	LC	breeding (2011–2015)	1–2 pairs	C6
Common Little Bittern Ixobrychus minutus	LC	breeding (2011–2015)	1–2 pairs	C6
Black-crowned Night Heron Nycticorax nycticorax	LC	breeding (2011–2015)	1 pairs	C6
A4iii Species group - waterbirds	n/a	non-breeding (2011–2015)	35,558–51,009 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
Invasive and other problematic species and genes	happe­ning now	whole of popul­ation/area (>90%)	rapid decline (>30% over 3 gener­ations)	very high
Residential and commercial development	likely in long term (>4 years)	most of popul­ation/area (50–90%)	rapid decline (>30% over 3 gener­ations)	high
Human intrusions and disturbance	likely in short term (<4 years)	some of popul­ation/area (10–49%)	slow decline (1–10% over 3 gener­ations)	medium
Pollution	likely in long term (>4 years)	some of popul­ation/area (10–49%)	slow decline (1–10% over 3 gener­ations)	medium
Natural system modifications	likely in long term (>4 years)	some of popul­ation/area (10–49%)	no or slight decline (<1% over 3 gener­ations)	low

Response (conservation actions taken for the trigger species and/or their habitats)
Designation	Planning	Action	Result
Whole area (>90%) covered by appropriate conservation designation	No management plan exists, but the management planning process has begun	Some limited conservation initiatives are in place	low

Year	Protected Area	Designation (management category)	% coverage of IBA
-	Spiegelplas	Nature Reserve (-)	<1
-	Tienhovense Plassen	Nature Reserve (-)	3
-	Wijde Blik	Nature Reserve with Management Subsidy (-)	<1
-	Polder Mijnden	Nature Conservation Law (-)	1
-	Horstermeerpolder II	Nature Reserve (-)	1
-	Ankeveense Plassen	Nature Reserve (-)	9
-	Het Hol, Kortenhoef	Nature Reserve (-)	3
-	Horstermeerpolder	Nature Reserve (-)	1
-	Kortenhoefse Plassen	Nature Reserve (-)	5
-	Loosdrechtse Plassen	Nature Reserve (-)	7
1986	Weerribben	Natuurbeschermingswet (IV)	-
1991	Moerasterrein Loosdrecht	Natural Monument (-)	1
2004	Oostelijke Vechtplassen	Natuurbeschermingswet (IV)	100

Habitat	% of IBA	Habitat detail
Wetlands (inland)	75	Standing freshwater; Water fringe vegetation
Forest	20	Alluvial and very wet forest
Artificial/Terrestrial	5	Highly improved re-seeded landscapes

Land use	% of IBA
water management	100
hunting	80
tourism/recreation	65
fisheries/aquaculture	60
nature conservation and research	27
urban/industrial/transport	8
agriculture	5

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