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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  1992  193 individuals  good  A4i, B1i, B2, C2  Least Concern 
Eurasian Wigeon Mareca penelope winter  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 Areas factsheet: Reeuwijkse Plassen. Downloaded from on 04/10/2015

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