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Location Netherlands, Zuid-Holland
Central coordinates 4o 47.00' East  52o 3.00' North
IBA criteria A4i, A4iii, B1i, B2, C2, C3, C4
Area 1,650 ha
Year of IBA assessment 2000

Vogelbescherming Nederland

Site description A complex of shallow lakes interspersed with strips of land, reed margins, wet meadows and improved grassland, located to the north-east of the city of Gouda.

Key Biodiversity The average seasonal peak number of waterbirds during 1992-1996 was more than 20,000.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Tundra Swan Cygnus columbianus winter  1988-1992  193 individuals  good  A4i, B1i, B2, C2  Least Concern 
Eurasian Wigeon Mareca penelope winter  1988-1992  14,976 individuals  good  B1i, C3  Least Concern 
A4iii Species group - waterbirds winter  1992  20,000 individuals  unknown  A4iii, C4   

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Broekvelden/Vettenbroek Wetlands of International Importance (Ramsar) 700 protected area contained by site 700  
Polder Stein - NL2003039 Birds Directive 0 protected area overlaps with site 468  
Reeuwijkse Plassen Nature Reserve 227 protected area contained by site 227  


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Standing freshwater; Water fringe vegetation  51%
Artificial - terrestrial Highly improved re-seeded landscapes  45%

Land use

Land-use Extent (% of site)
agriculture 20%
fisheries/aquaculture 45%
water management 100%
hunting 50%
nature conservation and research 14%
tourism/recreation 55%

Protection status National Partial International None227 ha of IBA covered by Nature Reserve (Reeuwijkse Plassen, 227 ha).

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Recommended citation  BirdLife International (2015) Important Bird and Biodiversity Area factsheet: Reeuwijkse Plassen. Downloaded from on 01/12/2015

To provide new information to update this factsheet or to correct any errors, please email BirdLife