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close| Location | Netherlands, Noord-Holland |
| Central coordinates | 4o 50.00' East 52o 31.00' North |
| IBA criteria | A4i, B1i, C2, C3, C6 |
| Area | 1,940 ha |
| Altitude | |
| Year of IBA assessment | 2000 |
Site description A polder landscape including a shallow lake, ditches, wet meadows and marshland, situated to the north of the city of Zaandam. This site, together with sites 068, 071 and 072, 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 |
|---|---|---|---|---|---|---|
| Eurasian Wigeon Anas penelope | winter | 1991 | 17,410 individuals | good | B1i, C3 | Least Concern |
| Eurasian Spoonbill Platalea leucorodia | non-breeding | 1991 | 38 individuals | good | B1i, C2 | Least Concern |
| Black-tailed Godwit Limosa limosa | non-breeding | 1992 | 5,500 individuals | medium | A4i, B1i, C3 | Near Threatened |
| Ruff Philomachus pugnax | breeding | 1993 | 19 breeding pairs | medium | C6 | Least Concern |
Protected areas
| Protected area | Designation | Area (ha) | Relationship with IBA | Overlap with IBA (ha) | |
|---|---|---|---|---|---|
| Wormer- en Jisperveld | Nature Reserve | 618 | protected area contained by site | 618 | |
| Wormer- en Jisperveld | Wetlands of International Importance (Ramsar) | 0 | protected area overlaps with site | 0 | |
| Wormer- en Jisperveld - NL9802058 | Birds Directive | 1,753 | protected area contained by site | 1,753 | |
| Wormer- en Jisperveld en Kalverpolder - NL2003054 | Habitats Directive | 1,435 | protected area overlaps with site | 1,503 |
Habitats
| IUCN habitat | Habitat detail | Extent (% of site) |
|---|---|---|
| Wetlands (inland) | Standing freshwater; Water fringe vegetation | 17% |
| Artificial landscapes (terrestrial) | Highly improved re-seeded landscapes | 83% |
Land use
| Land-use | Extent (% of site) |
|---|---|
| agriculture | 25% |
| fisheries/aquaculture | 10% |
| water management | 100% |
| hunting | 10% |
| nature conservation and research | 32% |
| tourism/recreation | 11% |
Management considerations The main problems are the nutrient pollution of wetlands (`Other' threat, above), disturbance caused by ultra-light planes, and the effects of urbanization. A compensation scheme is in place for those farmers affected by restrictions on agricultural practices.
Protection status National Partial International None618 ha of IBA covered by Nature Reserve (Wormer- en Jisperveld, 618 ha).
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Recommended citation BirdLife International (2013) Important Bird Areas factsheet: Wormer-and Jisperveld. Downloaded from http://www.birdlife.org on 20/06/2013
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