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Location Netherlands, Noord-Holland
Central coordinates 4o 52.00' East  52o 27.00' North
IBA criteria A4i, B1i, C3, C6
Area 750 ha
Year of IBA assessment 2000

Vogelbescherming Nederland

Site description The IBA comprises a polder landscape with wet meadows and ditches. It is located to the north of the city of Amsterdam and adjoins Ilperveld, Varkensland and Twiske (071). This site, together with sites 068, 070 and 071, formed part of a single, larger site (former site NL038) in the previous pan-European IBA inventory (Grimmett and Jones 1989).

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Black-tailed Godwit Limosa limosa non-breeding  1990-1992  6,000 individuals  medium  A4i, B1i, C3  Near Threatened 
Ruff Calidris pugnax breeding  1988-1991  14 breeding pairs  good  C6  Least Concern 


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Standing freshwater; Water fringe vegetation  20%
Artificial - terrestrial Highly improved re-seeded landscapes  80%

Land use

Land-use Extent (% of site)
agriculture 75%
fisheries/aquaculture 10%
water management 100%
nature conservation and research 38%
tourism/recreation 25%
hunting 70%

Protection status National Partial International None279 ha of IBA covered by Nature Reserve (Oostzanerveld, 279 ha).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Oostzanerveld. Downloaded from on 22/10/2016

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