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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
Greylag Goose Anser anser	LC	winter	2011	13,840-38,115 individuals	A4i, B1i, C3
Black-bellied Sandgrouse Pterocles orientalis	LC	resident	2003	33-48 breeding pairs	C2, C6
Little Bustard Tetrax tetrax	NT	winter	1995	250-300 individuals	A1, B2, C1, C6
Little Bustard Tetrax tetrax	NT	resident	2003	739-974 individuals	A1, B2, C1, C6
Great Bustard Otis tarda	EN	resident	2003	min 2,668 individuals	A1, B2, C1, C2, C6
Black-crowned Night Heron Nycticorax nycticorax	LC	breeding	1995	30 breeding pairs	C6
Purple Heron Ardea purpurea	LC	breeding	1996	30-31 breeding pairs	C2, C6
Eurasian Thick-knee Burhinus oedicnemus	LC	resident	1996	80-100 breeding pairs	C6
Black-winged Stilt Himantopus himantopus	LC	breeding	2003	120-140 breeding pairs	C6
Eurasian Dotterel Eudromias morinellus	LC	winter	1992	1,000 individuals	A4i, B1i, C2
Western Marsh-harrier Circus aeruginosus	LC	breeding	2003	min 54 breeding pairs	C6
Montagu's Harrier Circus pygargus	LC	resident	2003	99-121 breeding pairs	B3, C2, C6
Red Kite Milvus milvus	LC	winter	1994	600-1,400 individuals	A1, A4ii, B1iii, C1, C2
Black Kite Milvus migrans	LC	breeding	1995	50-80 breeding pairs	C6
Lesser Kestrel Falco naumanni	LC	breeding	2003	211-213 breeding pairs	B2, C2, C6
Calandra Lark Melanocorypha calandra	LC	resident	1996	4,500-11,000 breeding pairs	B2
Aquatic Warbler Acrocephalus paludicola	VU	passage	2011	300-950 individuals	A1, C1

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
Greylag Goose Anser anser	2,000	32,000	individuals	100	favourable

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

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Agricultural expansion and intensification	happening now	majority/most of area/population (50-90%)	moderate to rapid deterioration	high
Transportation and service corridors	happening now	some of area/population (10-49%)	moderate to rapid deterioration	high
Biological resource use	happening now	some of area/population (10-49%)	moderate to rapid deterioration	high
Human intrusions and disturbance	happening now	some of area/population (10-49%)	moderate to rapid deterioration	high
Natural system modifications	happening now	some of area/population (10-49%)	moderate to rapid deterioration	high
Invasive and other problematic species and genes	happening now	some of area/population (10-49%)	moderate to rapid deterioration	high
Pollution	happening now	some of area/population (10-49%)	moderate to rapid deterioration	high
Climate change and severe weather	happening now	majority/most of area/population (50-90%)	moderate to rapid deterioration	high

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	A comprehensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species	Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity	high

Year	Protected Area	Designation	% overlap with IBA
2000	La Nava-Campos Norte	Special Protection Area (Birds Directive)	16
2000	La Nava-Campos Sur	Special Protection Area (Birds Directive)	3
2000	Oteros-Campos	Special Protection Area (Birds Directive)	9
2000	Penillanuras-Campos Sur	Special Protection Area (Birds Directive)	4
2000	Penillanuras-Campos Norte	Special Protection Area (Birds Directive)	3
2000	Oteros-Cea	Special Protection Area (Birds Directive)	1
2000	Lagunas De Los Oteros	Site of Community Importance (Habitats Directive)	1
2000	Riberas Del Río Cea	Site of Community Importance (Habitats Directive)	<1
2000	Riberas Del Río Esla y Afluentes	Site of Community Importance (Habitats Directive)	<1
2002	Laguna de la Nava de Fuentes	Ramsar Site, Wetland of International Importance	-
2004	Laguna De La Nava	Site of Community Importance (Habitats Directive)	<1

Habitat1	Habitat detail	% of IBA
Artificial/Terrestrial	Arable land, Forestry plantations, Ruderal land	90
Grassland	Humid grasslands	5
Forest	Alluvial and very wet forest, Broadleaved evergreen woodland	-
Wetlands (inland)	Standing freshwater, Rivers and streams, Water fringe vegetation	-

1. IUCN Habitat classification.

Land use	% of IBA
agriculture	100
hunting	100

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Tierra de Campos steppes (Spain). Downloaded from https://datazone.birdlife.org/site/factsheet/tierra-de-campos-steppes-iba-spain on 22/11/2024.