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Location Poland, swietokrzyskie
Central coordinates 20o 30.00' East  50o 34.00' North
IBA criteria C1, C4, C6
Area 15,960 ha
Altitude 190 - 200m
Year of IBA assessment 2010

Ogólnopolskie Towarzystwo Ochrony Ptaków

Site description The site comprises the stretch of the Nida river valley between the villages of Mostowice and Skowronno Dolne, as well as a wedge of a few square kilometres' area between Umianowice and Skowronno. The valley widens gradually up to 6 km width, to the gorge near the village of Sobowice. The whole of the site is covered by a system of small watercourses, and there are four low hills. There are many oxbow lakes, mires and seasonally flooded areas with aquatic vegetation (e.g. Potamogeton) and reed Phragmites. Amongst the meadows there are areas of wet alder Alnus forest and clumps of willow Salix, while the riversides are lined with trees/scrub of Salix and poplar Populus.

Key Biodiversity A total of 125 species have been recorded breeding, including 47 waterbirds.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Ixobrychus minutus breeding  2004-2009  17 breeding pairs  good  C6  Not Recognised 
Western Marsh-harrier Circus aeruginosus breeding  2004-2009  63-68 breeding pairs  good  C6  Least Concern 
Corncrake Crex crex breeding  2004-2009  250-350 males only  good  C1, C6  Least Concern 
Little Crake Zapornia parva breeding  2001-2009  35-37 males only  good  C6  Least Concern 
Spotted Crake Porzana porzana breeding  2001-2009  90-100 males only  good  C6  Least Concern 
Black-tailed Godwit Limosa limosa breeding  2004-2009  260-270 breeding pairs  good  C1  Near Threatened 
Black-tailed Godwit Limosa limosa passage  2002-2009  800 individuals  good  C1  Near Threatened 
Eurasian Curlew Numenius arquata passage  2004-2009  150 individuals  good  C1  Near Threatened 
Short-eared Owl Asio flammeus passage  2004-2009  6 individuals  good  C6  Least Concern 
Syrian Woodpecker Dendrocopos syriacus breeding  2004-2009  24-27 breeding pairs  good  C6  Least Concern 
A4iii Species group - waterbirds passage  2004-2009  44,000-52,000 individuals  good  C4   

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Nadnidzianski Park Krajobrazowy Landscape Park 23,164 protected area overlaps with site 2,000  
Umianowice Ecological Area 300 protected area contained by site 300  


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

Land use

Land-use Extent (% of site)
agriculture 70%
not utilised 30%
hunting -

Protection status National High International None2,000 ha of IBA covered by Landscape Park (Nadnidziañski, 22,850 ha). 300 ha of IBA covered by Ecological Area (Umianowice, 300 ha).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Nida Rivar Valley. Downloaded from on 21/10/2016

To provide new information to update this factsheet or to correct any errors, please email BirdLife