• Summary
• Text account
• Data table and detailed info
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• Reference and further resources

The site was identified as important 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 List1	Season	Year(s)	Size	IBA criteria
Black-crowned Night Heron Nycticorax nycticorax	LC	breeding	2000	min 178 breeding pairs	B2, C2, C6

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

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.

State (condition of the trigger species' populations)
Species	Reference	Actual	Units	% remaining	Result
Black-crowned Night Heron Nycticorax nycticorax	211	211	breeding pairs	100	favourable

State (condition of the trigger species' habitats)
Habitat	Quantity (% remaining)	Quality (% carrying capacity)	Result
Forest	moderate (70-90%)	moderate (70-90%)	unfavourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Transportation and service corridors	likely in short term (within 4 years)	some of area/population (10-49%)	slow but significant deterioration	medium
Biological resource use	happening now	small area/few individuals (<10%)	no or imperceptible deterioration	low
Pollution	happening now	small area/few individuals (<10%)	slow but significant deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Whole area of site (>90%) covered by appropriate conservation designation	No management planning has taken place	Very little or no conservation action taking place	low

Year	Protected Area	Designation	% overlap with IBA
2000	Riberas del Pisuerga	Special Protection Area (Birds Directive)	37
2000	Riberas Del Río Pisuerga y Afluentes	Site of Community Importance (Habitats Directive)	22

Habitat1	Habitat detail	% of IBA
Artificial/Terrestrial	Arable land, Other urban and industrial areas	75
Forest	Alluvial and very wet forest	15
Wetlands (inland)	Rivers and streams	10

1. IUCN Habitat classification.

Land use	% of IBA
agriculture	75
hunting	40
urban/industrial/transport	5
water management	5

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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 23/11/2024.