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• Text account
• Data table and detailed info
• Map
• Reference and further resources

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'):

Species	Current IUCN Red List Category	Season	Year(s)	Population estimate at site	IBA criteria met
Whooper Swan Cygnus cygnus	LC	winter	2005-2008	1,000-3,000 individuals	C2
Greylag Goose Anser anser	LC	passage	1995-2003	5,000 individuals	C3
Bean Goose Anser fabalis	LC	passage	2005-2008	17,000-90,000 individuals	C3
Greater White-fronted Goose Anser albifrons	LC	winter	1995-2003	25,000 individuals	C3
Greater White-fronted Goose Anser albifrons	LC	passage	2005-2008	10,000-45,000 individuals	C3
Corncrake Crex crex	LC	breeding	2005-2008	50-350 males	C1, C6
Spotted Crake Porzana porzana	LC	breeding	2005-2008	2-43 males	C6
Common Coot Fulica atra	LC	passage	1995-2003	19,300 individuals	C3
Common Crane Grus grus	LC	passage	2005-2008	400-5,200 individuals	C2
Great White Egret Ardea alba	LC	passage	2008-2009	500 individuals	C2
Eurasian Curlew Numenius arquata	NT	breeding	2005-2009	10-12 breeding pairs	C1
Black-tailed Godwit Limosa limosa	NT	breeding	2005-2009	10-16 breeding pairs	C1
Whiskered Tern Chlidonias hybrida	LC	breeding	2005-2008	30-160 breeding pairs	C6
Black Tern Chlidonias niger	LC	breeding	2005-2008	50-80 breeding pairs	C6
Common Tern Sterna hirundo	LC	breeding	2005-2008	36-200 breeding pairs	C6
Aquatic Warbler Acrocephalus paludicola	VU	breeding	2005-2008	4-8 males	C1
A4iii Species group - waterbirds	n/a	passage	2005-2009	130,000-150,000 individuals	C4

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2010).

Pressure (threats to the trigger species and/or their habitats)
Threat level 1	Threat level 2	Timing	Scope	Severity	Result
Agricultural expansion and intensification	annual & perennial non-timber crops - agro-industry farming	happening now	majority/most of area/population (50-90%)	moderate to rapid deterioration	high
Climate change and severe weather	habitat shifting and alteration	happening now	majority/most of area/population (50-90%)	slow but significant deterioration	high
Invasive and other problematic species and genes	invasive non-native/alien species/diseases - unspecified species	happening now	majority/most of area/population (50-90%)	moderate to rapid deterioration	high
Natural system modifications	dams & water management/use - large dams	happening now	majority/most of area/population (50-90%)	very rapid to severe deterioration	very high

Response (conservation actions taken for the trigger species and/or their habitats)
Protected-area designation	Management planning	Other conservation 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	Some limited conservation initiatives are in place	medium

For more information about IBA conservation status, please click here

Protected area (PA)	PA designation	PA area (ha)	Relationship of PA with IBA	Overlap of PA with IBA (ha)
Warta River Mouth National Park (Park Narodowy “Ujscie Warty”)	Ramsar Site, Wetland of International Importance	7,956	protected area contained by site	4,235
Ujście Warty	Site of Community Importance (Habitats Directive)	33,297	protected area overlaps with site	0
Ujście Warty	Special Protection Area (Birds Directive)	33,297	protected area overlaps with site	32,800
Słubicka Dolina Odry	Obszar Chronionego Krajobrazu	13,921	protected area is adjacent to site	0
Slonsk	Nature Reserve	4,166	protected area contained by site	4,166
Park Narodowy Ujście Warty	Park Narodowy	8,078	protected area contained by site	0
Park Krajobrazowy Ujście Warty	Park Krajobrazowy	19,750	protected area overlaps with site	4,244
Pamięcin	Rezerwat Przyrody	12	protected area contained by site	0
Lemierzyce	Rezerwat Przyrody	3	protected area contained by site	0
Gorzowsko-Krzeszycka Dolina Warty	Obszar Chronionego Krajobrazu	15,089	protected area overlaps with site	0
Dolina Postomii	Rezerwat Przyrody	65	protected area contained by site	0

Habitat (IUCN level 1)	Habitat detail	Extent (% of site)
Forest	Alluvial and very wet forest	-
Grassland	Humid grasslands	-
Wetlands (inland)		-

For more information about the IUCN Habitat classification, please click here.

Land-use	Extent (% of site)
agriculture	-
water management	-

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Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Warta River Mouth. Downloaded from http://datazone.birdlife.org/site/factsheet/warta-river-mouth-iba-poland on 01/10/2023.