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Location Netherlands, Zuid-Holland
Central coordinates 4o 2.00' East  51o 55.00' North
IBA criteria B1i, B3, C3, C6
Area 350 ha
Year of IBA assessment 2000

Vogelbescherming Nederland

Site description A shallow bay between the old coast (Voornes Duin, site 022) and the harbour extension of Rotterdam (Maasvlakte), bordered by the Voordelta (020) on the seaward side. It is part of the former mouth of the River Maas, which was closed off in 1966.

Key Biodiversity A recently built small islet holds breeding terns Sterna, Recurvirostra avosetta and Charadrius alexandrinus. The mudflats are attractive to waders on passage.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Pied Avocet Recurvirostra avosetta breeding  1988-1991  174 breeding pairs  good  B3  Least Concern 
Common Redshank Tringa totanus non-breeding  1989-1991  2,275 individuals  medium  B1i, C3  Least Concern 
Sandwich Tern Thalasseus sandvicensis breeding  1987-1991  88 breeding pairs  good  C6  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Voordelta Wetlands of International Importance (Ramsar) 90,000 protected area contains site 350  


IUCN habitat Habitat detail Extent (% of site)
Coastline Mud flats & sand flats; Salt marshes  90%
Sea Open Sea  10%

Land use

Land-use Extent (% of site)
fisheries/aquaculture 10%
nature conservation and research 100%
tourism/recreation 10%

Protection status National None International None

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Westplaat. Downloaded from on 27/10/2016

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