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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
Mute Swan Cygnus olor	LC	passage	1995-2003	1,800-3,500 individuals	C3
Greater White-fronted Goose Anser albifrons	LC	passage	2006	15,600 individuals	C3
Smew Mergellus albellus	LC	passage	2006-2009	500-2,000 individuals	C2
Spotted Crake Porzana porzana	LC	breeding	1995-2003	20-100 males	C6
Great Cormorant Phalacrocorax carbo	LC	breeding	2009	8,918-10,226 breeding pairs	C3
Little Gull Hydrocoloeus minutus	LC	passage	2006-2009	400-5,500 individuals	C2
Black Tern Chlidonias niger	LC	breeding	2006-2009	80-160 breeding pairs	C6
White-tailed Sea-eagle Haliaeetus albicilla	LC	breeding	2006-2009	8-10 breeding pairs	C6
A4iii Species group - waterbirds	n/a	passage	2006-2008	22,000-26,000 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 (2019) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Agricultural expansion and intensification	happening now	whole area/population (>90%)	very rapid to severe deterioration	very high
Transportation and service corridors	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%)	very rapid to severe deterioration	very high
Biological resource use	happening now	whole area/population (>90%)	slow but significant deterioration	high
Natural system modifications	past (and unlikely to return) and no longer limiting	small area/few individuals (<10%)	very rapid to severe deterioration	low
Residential and commercial development	happening now	small area/few individuals (<10%)	moderate to rapid deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Some of site covered (10-49%)	No management planning has taken place	Very little or no conservation action taking place	not assessed

Year	Protected Area	Designation	% overlap with IBA
-	Vistula Lagoon	Baltic Sea Protected Area (Helcom)	99
1985	Park Krajobrazowy Wysoczyzny Elbląskiej	Park Krajobrazowy	2
1985	Wybrzeża Staropruskiego	Obszar Chronionego Krajobrazu	2
1985	Park Krajobrazowy Mierzeja Wiślana	Park Krajobrazowy	1
1985	Rzeki Nogat (woj. warmińsko-mazurskie)	Obszar Chronionego Krajobrazu	<1
1985	Wysoczyzny Elbląskiej - Wschód	Obszar Chronionego Krajobrazu	<1
1991	Zatoka Elbląska	Rezerwat Przyrody	1
2001	Zalew Wiślany i Mierzeja Wiślana	Site of Community Importance (Habitats Directive)	100
2001	Ujście Nogatu	Rezerwat Przyrody	1
2004	Zalew Wiślany	Special Protection Area (Birds Directive)	96
2005	Zalew Wislany i Mierzeja Wislana	Baltic Sea Protected Area (HELCOM)	100

Habitat1	Habitat detail	% of IBA
Forest		1
Grassland		1
Marine Coastal/Supratidal		major (>10)

1. IUCN Habitat classification.

Land use	% of IBA
fisheries/aquaculture	60
tourism/recreation	20
other	10
hunting	10

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Vistula Lagoon (Poland). Downloaded from https://datazone.birdlife.org/site/factsheet/vistula-lagoon-iba-poland on 22/11/2024.