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Location Netherlands, Friesland
Central coordinates 5o 41.00' East  53o 0.00' North
IBA criteria A4i, A4iii, B1i, B2, C2, C3, C4
Area 460 ha
Year of IBA assessment 2000

Vogelbescherming Nederland

Site description A freshwater lake (former peat-workings) surrounded by marshland and wet meadows that partly flood in winter, and located to the south of the city of Sneek. The site belongs to the same water management unit as Lake Sneekermeer (058). Human activities include reed-harvesting (`Other' land-use, below).

Key Biodiversity This is an important roost for geese Anser from surrounding feeding areas. The mean total number of waterbirds in winter exceeds 20,000. Waterbird numbers quoted are rough estimates.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Pink-footed Goose Anser brachyrhynchus winter  1979-1989  10,000 individuals  good  A4i, B1i, C3  Least Concern 
Greater White-fronted Goose Anser albifrons winter  1979-1989  15,000 individuals  good  A4i, B1i, C3  Least Concern 
Barnacle Goose Branta leucopsis winter  1979-1989  5,000 individuals  good  A4i, B1i, B2, C2  Least Concern 
A4iii Species group - waterbirds winter  1989  20,000-49,999 individuals  unknown  A4iii, C4   

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Witte en Zwarte Brekken Nature Reserve 285 protected area overlaps with site 262  


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Standing freshwater; Water fringe vegetation  45%
Artificial - terrestrial Highly improved re-seeded landscapes  55%

Land use

Land-use Extent (% of site)
agriculture 25%
other 5%
fisheries/aquaculture 30%
water management 100%
hunting 10%
nature conservation and research 57%
tourism/recreation 35%

Protection status National Partial International None262 ha of IBA covered by Nature Reserve (Witte en Zwarte Brekken, 285 ha).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Lake Witte and Zwarte Brekken. Downloaded from on 23/10/2016

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