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close| Location | Croatia, Viroviticko-podravska zupanija |
| Central coordinates | 18o 3.00' East 45o 40.00' North |
| IBA criteria | A1, B1i, B2, B3 |
| Area | 1,020 ha |
| Altitude | 99 - 102m |
| Year of IBA assessment | 2000 |
Ornithological information This is an important site for breeding herons and terns. Species of global conservation concern that do not meet IBA criteria: Aythya nyroca, Haliaeetus albicilla (1-9 wintering).
Site description A complex of fish-ponds surrounded by water-fringe vegetation and some completely covered with emergent vegetation. Wet meadows and pastures are adjacent to the fish-ponds.
Populations of IBA trigger species
| Species | Season | Period | Population estimate | Quality of estimate | IBA Criteria | IUCN Category |
|---|---|---|---|---|---|---|
| Common Pochard Aythya ferina | breeding | 1993 | 17 breeding pairs | medium | B3 | Least Concern |
| Ferruginous Duck Aythya nyroca | breeding | 1993 | 20-50 breeding pairs | medium | A1, B2 | Near Threatened |
| Little Bittern Ixobrychus minutus | breeding | 1995 | 15-20 breeding pairs | medium | B2 | Least Concern |
| Black-crowned Night-heron Nycticorax nycticorax | breeding | 1995 | 23-100 breeding pairs | good | B2 | Least Concern |
| Squacco Heron Ardeola ralloides | breeding | 1995 | 2-20 breeding pairs | good | B2 | Least Concern |
| Whiskered Tern Chlidonias hybrida | breeding | 1993 | 200 breeding pairs | medium | B1i, B2 | Least Concern |
Habitats
| IUCN habitat | Habitat detail | Extent (% of site) |
|---|---|---|
| Forest | - | |
| Grassland | Humid grasslands | 5% |
| Wetlands (inland) | Standing freshwater; Water fringe vegetation | 90% |
| Artificial landscapes (terrestrial) | 5% |
Land use
| Land-use | Extent (% of site) |
|---|---|
| fisheries/aquaculture | 95% |
| hunting | 95% |
| agriculture | 5% |
Management considerations The fish-ponds are leased to foreign hunters. Breeding birds are disturbed by fishermen and by the shooting of Phalacrocorax carbo.
Protection status National None International None
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Recommended citation BirdLife International (2013) Important Bird Areas factsheet: Grudnjak fish-ponds. Downloaded from http://www.birdlife.org on 21/05/2013
To provide new information to update this factsheet or to correct any errors, please email BirdLife
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