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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
Greater White-fronted Goose Anser albifrons	LC	non-breeding	2011-2015	10,178-12,136 individuals	B1i, C3
Eurasian Wigeon Mareca penelope	LC	non-breeding	2011-2015	37,560-54,141 individuals	A4i, B1i, C3
Eurasian Wigeon Mareca penelope	LC	winter	2011-2015	24,811 individuals	B3
A4iii Species group - waterbirds	n/a	non-breeding	2011-2015	65,941-86,361 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
Agricultural expansion and intensification	happening now	majority/most of area/population (50-90%)	moderate to rapid deterioration	high
Human intrusions and disturbance	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Natural system modifications	likely in long term (beyond 4 years)	some of area/population (10-49%)	slow but significant deterioration	medium

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	Some limited conservation initiatives are in place	medium

Year	Protected Area	Designation	% overlap with IBA
-	Groote Braak (Braken IJsselmeerdijk)	Nature Reserve	1
-	Zeevang	Nature Reserve	11
2000	Polder Zeevang	Special Protection Area (Birds Directive)	100
2010	Polder Zeevang	Natuurbeschermingswet	100

Habitat1	Habitat detail	% of IBA
Artificial/Terrestrial	Highly improved re-seeded landscapes	98
Wetlands (inland)	Water fringe vegetation	-

1. IUCN Habitat classification.

Land use	% of IBA
water management	100
agriculture	25
nature conservation and research	17
hunting	15
urban/industrial/transport	7

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Polder Zeevang (Netherlands). Downloaded from https://datazone.birdlife.org/site/factsheet/polder-zeevang-iba-netherlands on 22/11/2024.