IBA Justification

Year of most recent IBA criteria assessment: 2016

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population at site IBA criteria triggered
Barnacle Goose Branta leucopsis LC breeding 2011-2015 475-650 breeding pairs B3, C2, C6
Eurasian Wigeon Mareca penelope LC non-breeding 2011-2015 17,103-22,420 individuals B1i, C3
A4iii Species group - waterbirds n/a non-breeding 2011-2015 26,249-32,362 individuals A4iii, C4

Note: The current IUCN Red List category may differ from the category that was valid at the time of IBA criteria assessment.

For more information about the IBA criteria, please click here

IBA Conservation

IBA conservation status - summary
Year of assessment (most recent) Threat (pressure) Condition (state) Action (response)
2018 high not assessed medium
Was the whole site assessed? yes Condition (state) assessed by unset
Accuracy of information medium

Threats to the site (pressure)
Threat level 1 Threat level 2 Timing Scope Severity Result
Human intrusions and disturbance recreational activities happening now majority/most of area/population (50-90%) slow but significant deterioration high
Invasive and other problematic species and genes problematic native species/diseases - unspecified species happening now majority/most of area/population (50-90%) moderate to rapid deterioration high
Transportation and service corridors flight paths happening now some of area/population (10-49%) no or imperceptible deterioration low
Transportation and service corridors utility & service lines happening now small area/few individuals (<10%) no or imperceptible deterioration low

Conservation actions taken at the site (response)
Protected-area designation Management planning Other conservation 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 Very little or no conservation action taking place medium
For more information about IBA conservation status, please click here

IBA Protection

Protected area (PA) PA designation PA area (ha) Relationship of PA with IBA Overlap of PA with IBA (ha)
Polder Mijzen Nature Reserve 214 protected area contained by site 214
Eilandspolder West Nature Reserve 323 protected area contained by site 323
Eilandspolder Oost Nature Reserve 671 protected area contained by site 671
Eilandspolder Natuurbeschermingswet 1,397 is identical to site 0
Eilandspolder Site of Community Importance (Habitats Directive) 798 protected area contained by site 801
Eilandspolder Special Protection Area (Birds Directive) 1,397 is identical to site 1,409


IUCN Habitat Habitat detail Extent (% of site)
Wetlands (inland) Standing freshwater, Water fringe vegetation -
Artificial/Terrestrial Highly improved re-seeded landscapes -
Unknown -
For further information about the IUCN habitat classification, please click here.

Land use

Land-use Extent (% of site)
agriculture -
other -
fisheries/aquaculture -
water management -
hunting -
nature conservation and research -
tourism/recreation -
For further information about the land-use classification, please click here.

Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Eilandspolder. Downloaded from on 09/06/2023.