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close| Location | Netherlands, Friesland |
| Central coordinates | 5o 25.00' East 52o 59.00' North |
| IBA criteria | A4i, A4iii, B1i, C2, C3, C4, C6 |
| Area | 1,320 ha |
| Altitude | |
| Year of IBA assessment | 2000 |
Ornithological information Non-breeding numbers are based on aerial counts which tend to underestimate species with a scattered occurrence. The site is an important roost for geese and waders, but actual roosting numbers are poorly reflected by counts. The average seasonal peak number of waterbirds during 1992-1996 exceeded 20,000.
Site description An area of shallow waters, wet meadows and (landward of the dyke) improved grassland along the Frisian west coast. It is a subsite of Lake IJsselmeer (034), and lies adjacent to the Makkumer- and Kooiwaard (035) in the north. This site, together with site 035, formed part of a single, larger site (former site NL016) 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 |
|---|---|---|---|---|---|---|
| Pied Avocet Recurvirostra avosetta | non-breeding | 1988 | 1,500 individuals | poor | A4i, B1i, C2 | Least Concern |
| Black-tailed Godwit Limosa limosa | non-breeding | 1986 | 9,000 individuals | medium | A4i, B1i, C3 | Near Threatened |
| Ruff Philomachus pugnax | breeding | 1991 | 13 breeding pairs | good | C6 | Least Concern |
| Ruff Philomachus pugnax | non-breeding | 1986 | 7,000 individuals | poor | C6 | Least Concern |
| Common Tern Sterna hirundo | breeding | 1991 | 1,680 breeding pairs | good | C2, C6 | Least Concern |
| A4iii Species group - waterbirds | unknown | - | 20,000 individuals | unknown | A4iii, C4 |
Protected areas
| Protected area | Designation | Area (ha) | Relationship with IBA | Overlap with IBA (ha) | |
|---|---|---|---|---|---|
| Friese IJsselmeerkust I | Natural Monument | 4,800 | protected area overlaps with site | 550 | |
| Friese IJsselmeerkust II | Natural Monument | 120 | protected area overlaps with site | 2 | |
| Workumerwaard | Wetlands of International Importance (Ramsar) | 0 | protected area overlaps with site | 0 |
Habitats
| IUCN habitat | Habitat detail | Extent (% of site) |
|---|---|---|
| Wetlands (inland) | Standing freshwater | 39% |
| Artificial landscapes (terrestrial) | Highly improved re-seeded landscapes | 61% |
Land use
| Land-use | Extent (% of site) |
|---|---|
| agriculture | 35% |
| other | 5% |
| fisheries/aquaculture | 39% |
| water management | 100% |
| nature conservation and research | 36% |
| tourism/recreation | 54% |
Management considerations The main problems are water management (the water-level is deliberately kept high during summer), agricultural intensification, and commercial reed-harvesting (`Other' threat, above). The foreshore is legally protected under the Nature Conservation Act.
Protection status National Partial International Partial550 ha of IBA covered by Natural Monument (Friese IJsselmeerkust I, 4,800 ha). 2 ha of IBA covered by Natural Monument (Friese IJsselmeerkust II, 120 ha). 550 ha of IBA covered by Special Protection Area (Friese IJsselmeerkust, 5,130 ha).
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Recommended citation BirdLife International (2013) Important Bird Areas factsheet: Workumerwaard. Downloaded from http://www.birdlife.org on 22/05/2013
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