Markiezaat This is an IBA in Danger! 

IBA Justification

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'):
Species Current IUCN Red List Category Season Year(s) Population estimate at site IBA criteria met
Barnacle Goose Branta leucopsis LC breeding 2011-2015 536-600 breeding pairs B3, C6
Common Pochard Aythya ferina VU non-breeding 2011-2015 2,467 individuals A1, C1
Common Pochard Aythya ferina VU winter 2011-2015 1,269 individuals B2
Gadwall Mareca strepera LC non-breeding 2011-2015 1,564-3,981 individuals B1i, C3
Eurasian Spoonbill Platalea leucorodia LC breeding 2011-2015 133-187 breeding pairs B1i, B3, C2, C6
Kentish Plover Charadrius alexandrinus LC breeding 2011-2015 8-21 breeding pairs C6

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2016).

IBA Conservation

IBA conservation assessment
Year of assessment (most recent) State (condition) Pressure (threat) Response (action)
2017 very unfavourable very high medium
Was the whole site assessed? State assessed by Accuracy of information
yes population good

State (condition of the trigger species' populations)
Scientific name Common name Reference population Actual population Units % of population remaining Result
Mareca strepera Gadwall 280 1564 individuals 100 favourable
Platalea leucorodia Eurasian Spoonbill 20 133 breeding pairs 100 favourable
Charadrius alexandrinus Kentish Plover 220 8 breeding pairs 4 very unfavourable

Pressure (threats to the trigger species and/or their habitats)
Threat level 1 Threat level 2 Timing Scope Severity Result
Pollution agricultural & forestry effluents - nutrient loads happening now majority/most of area/population (50-90%) very rapid to severe deterioration very high

Response (conservation actions taken for the trigger species and/or their habitats)
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)
Zoommeer Ramsar Site, Wetland of International Importance 1,175 protected area is adjacent to site 0
Oosterschelde Ramsar Site, Wetland of International Importance 38,000 protected area overlaps with site 2,030
Molenplaat Nature Reserve 107 protected area contained by site 107
Markiezaatsmeer-Zuid II Natural Monument 160 protected area contained by site 160
Markiezaatsmeer Zuid Natural Monument 1,700 protected area contained by site 1,700
Markiezaat Ramsar Site, Wetland of International Importance 1,832 is identical to site 0
Markiezaat Natuurbeschermingswet 1,832 is identical to site 1,300
Markiezaat Special Protection Area (Birds Directive) 1,832 is identical to site 1,800


Habitat (IUCN level 1) Habitat detail Extent (% of site)
Wetlands (inland) Standing freshwater, Water fringe vegetation -
Artificial/Terrestrial Highly improved re-seeded landscapes -
For more information about the IUCN Habitat classification, please click here.

Land use

Land-use Extent (% of site)
nature conservation and research -
agriculture -
hunting -

Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Markiezaat. Downloaded from on 01/10/2023.