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The site was identified as important 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 List1	Season	Year(s)	Size	IBA criteria
Corncrake Crex crex	LC	breeding	2004-2009	250-350 males	C1, C6
Spotted Crake Porzana porzana	LC	breeding	2001-2009	90-100 males	C6
Little Crake Zapornia parva	LC	breeding	2001-2009	35-37 males	C6
Common Little Bittern Ixobrychus minutus	LC	breeding	2004-2009	17 breeding pairs	C6
Eurasian Curlew Numenius arquata	NT	passage	2004-2009	150 individuals	C1
Black-tailed Godwit Limosa limosa	NT	breeding	2004-2009	260-270 breeding pairs	C1
Black-tailed Godwit Limosa limosa	NT	passage	2002-2009	800 individuals	C1
Short-eared Owl Asio flammeus	LC	passage	2004-2009	6 individuals	C6
Western Marsh-harrier Circus aeruginosus	LC	breeding	2004-2009	63-68 breeding pairs	C6
Syrian Woodpecker Dendrocopos syriacus	LC	breeding	2004-2009	24-27 breeding pairs	C6
A4iii Species group - waterbirds	n/a	passage	2004-2009	44,000-52,000 individuals	C4

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2010) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2010. The most recent assessment (2008) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Agricultural expansion and intensification	happening now	whole area/population (>90%)	very rapid to severe deterioration	very high
Climate change and severe weather	happening now	whole area/population (>90%)	moderate to rapid deterioration	very high
Residential and commercial development	happening now	some of area/population (10-49%)	very rapid to severe deterioration	high
Natural system modifications	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
Biological resource use	likely in short term (within 4 years)	some of area/population (10-49%)	moderate to rapid deterioration	medium
Transportation and service corridors	likely in short term (within 4 years)	small area/few individuals (<10%)	slow but significant deterioration	low
No known threats	happening now	small area/few individuals (<10%)	no or imperceptible deterioration	low
Energy production and mining	happening now	some of area/population (10-49%)	no or imperceptible deterioration	low
Human intrusions and disturbance	happening now	some of area/population (10-49%)	no or imperceptible 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	Some limited conservation initiatives are in place	low

Year	Protected Area	Designation	% overlap with IBA
1986	Nadnidziański Park Krajobrazowy	Park Krajobrazowy	13
1995	Włoszczowsko-Jędrzejowski	Obszar Chronionego Krajobrazu	8
1995	Umianowice	Ecological Area	2
2001	Ostoja Nidziańska	Site of Community Importance (Habitats Directive)	82
2001	Nadnidziański	Obszar Chronionego Krajobrazu	12
2001	Chęcińsko-Kielecki	Obszar Chronionego Krajobrazu	2
2007	Dolina Nidy	Special Protection Area (Birds Directive)	100
2009	Ostoja Sobkowsko-Korytnicka	Site of Community Importance (Habitats Directive)	8

Habitat1	Habitat detail	% of IBA
Grassland	Steppes and dry calcareous grassland, Humid grasslands, Mesophile grasslands	60
Wetlands (inland)	Standing freshwater, Rivers and streams, Water fringe vegetation, Fens, transition mires and springs	30
Artificial/Terrestrial	Highly improved re-seeded landscapes, Arable land	5
Forest	Native coniferous woodland, Alluvial and very wet forest	5

1. IUCN Habitat classification.

Land use	% of IBA
agriculture	70
not utilised	30
hunting	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Nida Rivar Valley (Poland). Downloaded from https://datazone.birdlife.org/site/factsheet/nida-rivar-valley-iba-poland on 23/11/2024.