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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
Ferruginous Duck Aythya nyroca	NT	breeding	2009	3-6 breeding pairs	C6
Corncrake Crex crex	LC	breeding	2004-2009	200-300 males	C1, C6
Little Crake Zapornia parva	LC	breeding	2009	30-50 males	C6
Common Little Bittern Ixobrychus minutus	LC	breeding	2004-2009	10-15 breeding pairs	C6
Black Tern Chlidonias niger	LC	breeding	2004-2009	60-100 breeding pairs	C6
Short-eared Owl Asio flammeus	LC	breeding	2004-2009	1-2 breeding pairs	C6
A4iii Species group - waterbirds	n/a	passage	2004-2009	20,000 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 (2010) is shown below.

State (condition of the trigger species' populations)
Species	Reference	Actual	Units	% remaining	Result
Ferruginous Duck Aythya nyroca	2	4	breeding pairs	100	not assessed
Corncrake Crex crex	50	300	males	100	favourable
Little Crake Zapornia parva	60	50	males	84	near favourable
Ixobrychus minutus	20	15	breeding pairs	75	near favourable
Black Tern Chlidonias niger	140	140	breeding pairs	100	not assessed
Short-eared Owl Asio flammeus	2	2	breeding pairs	100	not assessed

State (condition of the trigger species' habitats)
Habitat	Quantity (% remaining)	Quality (% carrying capacity)	Result
Grassland	moderate (70-90%)	moderate (70-90%)	unfavourable
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%)	very rapid to severe deterioration	very high
Invasive and other problematic species and genes	happening now	whole area/population (>90%)	moderate to rapid deterioration	very high
Natural system modifications	happening now	some of area/population (10-49%)	very rapid to severe deterioration	high
Pollution	happening now	some of area/population (10-49%)	very rapid to severe deterioration	high
Human intrusions and disturbance	happening now	majority/most of area/population (50-90%)	moderate to rapid deterioration	high
Biological resource use	happening now	majority/most of area/population (50-90%)	slow but significant deterioration	high
Residential and commercial development	likely in long term (beyond 4 years)	some of area/population (10-49%)	slow but significant deterioration	medium
Transportation and service corridors	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Energy production and mining	happening now	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

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
2007	Dolina Tyśmienicy	Special Protection Area (Birds Directive)	93
2008	Ostoja Parczewska	Site of Community Importance (Habitats Directive)	3

Habitat1	Habitat detail	% of IBA
Grassland	Humid grasslands, Mesophile grasslands	76
Wetlands (inland)	Standing freshwater, Water fringe vegetation, Fens, transition mires and springs	15
Artificial/Terrestrial	Highly improved re-seeded landscapes, Arable land	6
Forest	Native coniferous woodland, Mixed woodland, Alluvial and very wet forest	3

1. IUCN Habitat classification.

Land use	% of IBA
agriculture	85
fisheries/aquaculture	10
forestry	5
hunting	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Tysmienica river valley (Poland). Downloaded from https://datazone.birdlife.org/site/factsheet/tysmienica-river-valley-iba-poland on 23/11/2024.