• Summary
• 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') at the site:

Species	Red List1	Season	Year(s)	Size	IBA criteria
Common Goldeneye Bucephala clangula	LC	winter	2004-2009	1,500-22,700 individuals	C3
Goosander Mergus merganser	LC	winter	2004-2009	400-6,500 individuals	C3
Horned Grebe Podiceps auritus	VU	passage	2004-2009	10-300 individuals	C2
Eurasian Curlew Numenius arquata	NT	passage	2007-2009	100 individuals	C1
Little Gull Hydrocoloeus minutus	LC	passage	2007-2009	1,500-5,000 individuals	C2
Little Tern Sternula albifrons	LC	breeding	2007-2009	40-50 breeding pairs	C6
Common Tern Sterna hirundo	LC	breeding	2007-2009	300-360 breeding pairs	C6
Sandwich Tern Thalasseus sandvicensis	LC	passage	2007-2009	2,000 individuals	C2
Sandwich Tern Thalasseus sandvicensis	LC	breeding	2007-2009	300-570 breeding pairs	C2, C6
A4iii Species group - waterbirds	n/a	winter	2004-2009	31,700 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
Little Tern Sternula albifrons	45	15	breeding pairs	34	very unfavourable
Common Tern Sterna hirundo	160	50	breeding pairs	32	very unfavourable
Sandwich Tern Thalasseus sandvicensis	190	100	breeding pairs	53	unfavourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Biological resource use	happening now	whole area/population (>90%)	very rapid to severe deterioration	very high
Human intrusions and disturbance	happening now	whole area/population (>90%)	very rapid to severe deterioration	very high
Climate change and severe weather	happening now	whole area/population (>90%)	very rapid to severe deterioration	very high
Invasive and other problematic species and genes	happening now	majority/most of area/population (50-90%)	moderate to rapid deterioration	high
Agricultural expansion and intensification	happening now	majority/most of area/population (50-90%)	slow but significant deterioration	high
Pollution	happening now	whole area/population (>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
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
Some of site covered (10-49%)	No management plan exists but the management planning process has begun	Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity	low

Year	Protected Area	Designation	% overlap with IBA
-	Vistula river mouth	Baltic Sea Protected Area (Helcom)	100
1985	Środkowożuławski	Obszar Chronionego Krajobrazu	19
1991	Mewia Łacha	Rezerwat Przyrody	23
1991	Mewia Lacha (acha)	Nature Reserve	-
1994	Wyspy Sobieszewskiej	Obszar Chronionego Krajobrazu	11
1994	Żuław Gdańskich	Obszar Chronionego Krajobrazu	5
2004	Ujście Wisły	Special Protection Area (Birds Directive)	100
2004	Ostoja w Ujściu Wisły	Site of Community Importance (Habitats Directive)	69
2009	Ujscie Wisly	Baltic Sea Protected Area (HELCOM)	98
2015	Vistula River Mouth	Ramsar Site, Wetland of International Importance	98

Habitat1	Habitat detail	% of IBA
Grassland	Steppes and dry calcareous grassland, Humid grasslands	25
Forest	Broadleaved deciduous woodland, Native coniferous woodland, Mixed woodland, Alluvial and very wet forest	10
Shrubland	Scrub	5
Marine Coastal/Supratidal		major (>10)
Marine Intertidal		major (>10)

1. IUCN Habitat classification.

Land use	% of IBA
fisheries/aquaculture	50
nature conservation and research	35
forestry	5
tourism/recreation	5
agriculture	5
hunting	-

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