Data Zone
The site was identified as internationally important for bird conservation in 2010 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.
Populations meeting IBA criteria ('trigger species') at the site:| Species | Red List | Season (year/s of estimate) | Size | IBA criteria |
|---|---|---|---|---|
| Spotted Crake Porzana porzana | LC | breeding (2010) | 2–3 pairs | C6 |
| Baillon's Crake Zapornia pusilla | LC | breeding (2010) | 1–2 pairs | B2, C2, C6 |
| Eurasian Bittern Botaurus stellaris | LC | breeding (2010) | 2–3 males | C6 |
| Common Little Bittern Ixobrychus minutus | LC | breeding (2010) | 100–150 pairs | B2, C6 |
| Pygmy Cormorant Microcarbo pygmaeus | LC | breeding (2010) | 10–22 pairs | C6 |
| Pygmy Cormorant Microcarbo pygmaeus | LC | winter (2010) | 250–800 birds | B1i, C2, C6 |
| Moustached Warbler Acrocephalus melanopogon | LC | winter (2010) | 500–600 birds | C2, C6 |
| A4iii Species group - waterbirds | n/a | winter (2010) | min 20,000 birds | A4iii, C4 |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2010. The most recent assessment (2013) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2013 | not assessed | high | low |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | unset | unknown | |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Natural system modifications | happening now | whole of population/area (>90%) | slow decline (1–10% over 3 generations) | high |
| Pollution | happening now | whole of population/area (>90%) | slow decline (1–10% over 3 generations) | high |
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Whole area (>90%) covered by appropriate conservation designation | A management plan exists, but it is out of date or not comprehensive | Very little or no conservation action taking place | low |
| Year | Protected Area | Designation (management category) | % coverage of IBA |
|---|---|---|---|
| 2007 | Vransko jezero i Jasen | Other Area (-) | 100 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Artificial/Terrestrial | - | Arable land |
| Wetlands (inland) | - | Standing freshwater; Water fringe vegetation |
| Land use | % of IBA |
|---|---|
| agriculture | - |
| fisheries/aquaculture | - |
| hunting | - |
| tourism/recreation | - |
| other | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Vrana Lake and Jasen (Croatia). Downloaded from
https://datazone.birdlife.org/site/factsheet/vrana-lake-and-jasen-iba-croatia on 24/12/2024.