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The site was identified as internationally important for bird conservation 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 List	Season (year/s of estimate)	Size	IBA criteria
Whooper Swan Cygnus cygnus	LC	winter (2005–2008)	1,000–3,000 birds	C2
Greylag Goose Anser anser	LC	passage (1995–2003)	5,000 birds	C3
Bean Goose Anser fabalis	LC	passage (2005–2008)	17,000–90,000 birds	C3
Greater White-fronted Goose Anser albifrons	LC	winter (1995–2003)	25,000 birds	C3
Greater White-fronted Goose Anser albifrons	LC	passage (2005–2008)	10,000–45,000 birds	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
Eurasian Coot Fulica atra	LC	passage (1995–2003)	19,300 birds	C3
Common Crane Grus grus	LC	passage (2005–2008)	400–5,200 birds	C2
Great White Egret Ardea alba	LC	passage (2008–2009)	500 birds	C2
Eurasian Curlew Numenius arquata	NT	breeding (2005–2009)	10–12 pairs	C1
Black-tailed Godwit Limosa limosa	NT	breeding (2005–2009)	10–16 pairs	C1
Whiskered Tern Chlidonias hybrida	LC	breeding (2005–2008)	30–160 pairs	C6
Black Tern Chlidonias niger	LC	breeding (2005–2008)	50–80 pairs	C6
Common Tern Sterna hirundo	LC	breeding (2005–2008)	36–200 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 birds	C4

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2010. The most recent assessment (2013) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Natural system modifications	happe­ning now	most of popul­ation/area (50–90%)	rapid decline (>30% over 3 gener­ations)	very high
Agricultural expansion and intensification	happe­ning now	most of popul­ation/area (50–90%)	moderate decline (10–30% over 3 gener­ations)	high
Invasive and other problematic species and genes	happe­ning now	most of popul­ation/area (50–90%)	moderate decline (10–30% over 3 gener­ations)	high
Climate change and severe weather	happe­ning now	most of popul­ation/area (50–90%)	slow decline (1–10% over 3 gener­ations)	high

Response (conservation actions taken for the trigger species and/or their habitats)
Designation	Planning	Action	Result
Most of area (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

Year	Protected Area	Designation (management category)	% coverage of IBA
1970	Lemierzyce	Rezerwat Przyrody (IV)	<1
1973	Pamięcin	Rezerwat Przyrody (IV)	<1
1977	Slonsk	Nature Reserve (IV)	13
1997	Park Krajobrazowy Ujście Warty	Park Krajobrazowy (V)	13
2001	Park Narodowy Ujście Warty	Park Narodowy (II)	24
2005	Dolina Postomii	Rezerwat Przyrody (IV)	<1

Habitat	% of IBA	Habitat detail
Grassland	50	Humid grasslands
Forest	4	Alluvial and very wet forest
Wetlands (inland)	3

Land use	% of IBA
water management	100
agriculture	10

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Warta River Mouth (Poland). Downloaded from https://datazone.birdlife.org/site/factsheet/warta-river-mouth-iba-poland on 23/12/2024.