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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	2006-2009	40-70 males	C1
Common Little Bittern Ixobrychus minutus	LC	breeding	2006-2009	5-15 breeding pairs	C6
Mediterranean Gull Larus melanocephalus	LC	breeding	2007-2009	10-15 breeding pairs	C6
Little Tern Sternula albifrons	LC	breeding	2007-2009	420-540 breeding pairs	C6
Common Tern Sterna hirundo	LC	breeding	2007-2009	1,400-1,700 breeding pairs	C6

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 (2019) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Invasive and other problematic species and genes	happening now	whole area/population (>90%)	very rapid to severe deterioration	very high
Transportation and service corridors	likely in short term (within 4 years)	whole area/population (>90%)	very rapid to severe deterioration	very high
Natural system modifications	happening now	majority/most of area/population (50-90%)	very rapid to severe deterioration	very high
Human intrusions and disturbance	happening now	majority/most of area/population (50-90%)	moderate to rapid deterioration	high
Pollution	happening now	majority/most of area/population (50-90%)	moderate to rapid deterioration	high
Agricultural expansion and intensification	happening now	some of area/population (10-49%)	moderate to rapid deterioration	high
Climate change and severe weather	likely in short term (within 4 years)	whole area/population (>90%)	slow but significant deterioration	high
Biological resource use	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Residential and commercial development	likely in long term (beyond 4 years)	some of area/population (10-49%)	slow but significant deterioration	medium
Energy production and mining	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
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
Most of site (50-90%) covered (including the most critical parts for important bird species)	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	not assessed

Year	Protected Area	Designation	% overlap with IBA
-	Unknown	Protected Landscape Area	100
1981	Jabłonna	Rezerwat Przyrody	<1
1981	Ruska Kêpa	Nature Reserve	<1
1983	Dolina rzeki Pilicy i Drzewiczki	Obszar Chronionego Krajobrazu	2
1986	Nadwiślański (powiat garwoliński, miński i otwocki)	Obszar Chronionego Krajobrazu	15
1986	Nadwiślański (powiat sochaczewski)	Obszar Chronionego Krajobrazu	2
1988	Nadwiślański (powiat płoński, płocki i sochaczewski)	Obszar Chronionego Krajobrazu	21
1988	Gostynińsko-Gąbiński	Obszar Chronionego Krajobrazu	2
1994	Kępa Antonińska	Rezerwat Przyrody	2
1994	Kępa Wykowska	Rezerwat Przyrody	1
1994	Wyspy Zakrzewskie	Rezerwat Przyrody	1
1994	Wyspy Białobrzeskie	Rezerwat Przyrody	1
1994	Kępa Rakowska	Rezerwat Przyrody	<1
1994	Ławice Troszyńskie	Rezerwat Przyrody	<1
1994	Kêpa Wykowska	Nature Reserve	1
1994	Wyspy Biaóobrzeskie	Nature Reserve	<1
1997	Warszawski	Obszar Chronionego Krajobrazu	34
1998	Ławice Kiełpińskie	Rezerwat Przyrody	3
1998	Kępy Kazuńskie	Rezerwat Przyrody	2
1998	Wyspy Świderskie	Rezerwat Przyrody	2
1998	Zakole Zakroczymskie	Rezerwat Przyrody	2
1998	Łachy Brzeskie	Rezerwat Przyrody	2
1998	Wyspy Zawadowskie	Rezerwat Przyrody	2
1998	Wikliny Wiślane	Rezerwat Przyrody	1
1998	Wikliny Wis/lane	Nature Reserve	1
1998	Ke/py Kazun/skie	Nature Reserve	2
1998	L/awice Kiel/pin/skie	Nature Reserve	3
1998	Wyspy S/widerskie	Nature Reserve	2
2007	Dolina Środkowej Wisły	Special Protection Area (Birds Directive)	83
2008	Kampinoska Dolina Wisły	Site of Community Importance (Habitats Directive)	40

Habitat1	Habitat detail	% of IBA
Wetlands (inland)	Standing freshwater, Rivers and streams	45
Artificial/Terrestrial	Arable land, Ruderal land	21
Forest	Alluvial and very wet forest	13
Grassland	Humid grasslands, Mesophile grasslands	12
Other		9

1. IUCN Habitat classification.

Land use	% of IBA
fisheries/aquaculture	30
tourism/recreation	30
other	20
agriculture	15
nature conservation and research	5
urban/industrial/transport	-
hunting	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Middle Vistula River Valley (Poland). Downloaded from https://datazone.birdlife.org/site/factsheet/middle-vistula-river-valley-iba-poland on 23/11/2024.