Data Zone
The site was identified as internationally important for bird conservation in 2011 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 |
|---|---|---|---|---|
| Black-crowned Night Heron Nycticorax nycticorax | LC | breeding (2000) | min 178 pairs | B2, C2, C6 |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2011. The most recent assessment (2008) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2008 | poor | medium | low |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | habitat | poor | |
| State (condition of the trigger species' populations) | |||||
|---|---|---|---|---|---|
| Species | Actual vs Reference (units) | % remaining | Result | ||
| Black-crowned Night Heron Nycticorax nycticorax | 211 / 211 (pairs) | 100 | good | ||
| State (condition of the trigger species' habitats) | |||
|---|---|---|---|
| Habitat | Quantity (% remaining) | Quality (% carrying capacity) | Result |
| Forest | moderate (70–90%) | moderate (70–90%) | poor |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Transportation and service corridors | likely in short term (<4 years) | some of population/area (10–49%) | slow decline (1–10% over 3 generations) | medium |
| Pollution | happening now | few individuals/small area (<10%) | slow decline (1–10% over 3 generations) | low |
| Biological resource use | happening now | few individuals/small area (<10%) | no or slight decline (<1% over 3 generations) | low |
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Whole area (>90%) covered by appropriate conservation designation | No management planning has taken place | Very little or no conservation action taking place | low |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Artificial/Terrestrial | 75 | Arable land; Other urban and industrial areas |
| Forest | 15 | Alluvial and very wet forest |
| Wetlands (inland) | 10 | Rivers and streams |
| Land use | % of IBA |
|---|---|
| agriculture | 75 |
| hunting | 40 |
| urban/industrial/transport | 5 |
| water management | 5 |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: River Pisuerga at Dueñas (Spain). Downloaded from
https://datazone.birdlife.org/site/factsheet/river-pisuerga-at-dueñas-iba-spain on 26/12/2024.