ES042
River Pisuerga at Dueñas


IBA Justification

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

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2011) may differ.


IBA Conservation

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

Habitats

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

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 03/12/2024.