• Summary
• Text account
• Data table and detailed info
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• 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
Bean Goose Anser fabalis	LC	winter	2004-2008	13,000 individuals	C3
Mallard Anas platyrhynchos	LC	winter	2004-2008	28,300 individuals	C3
Common Teal Anas crecca	LC	winter	2004-2008	11,720 individuals	C3
Great White Egret Ardea alba	LC	breeding	2008	6 breeding pairs	C6
Black-tailed Godwit Limosa limosa	NT	breeding	2008	10 breeding pairs	C1
Little Gull Hydrocoloeus minutus	LC	passage	1995-2003	2,650 individuals	C2
Whiskered Tern Chlidonias hybrida	LC	breeding	2008	146 breeding pairs	C6
A4iii Species group - waterbirds	n/a	passage	2004-2008	77,500 individuals	C4

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

State (condition of the trigger species' populations)
Scientific name	Common name	Reference population	Actual population	Units	% of population remaining	Result
Anser fabalis	Bean Goose	1910	12700	individuals	100	favourable
Chlidonias hybrida	Whiskered Tern	30	60	breeding pairs	100	favourable

Response (conservation actions taken for the trigger species and/or their habitats)
Protected-area designation	Management planning	Other conservation action	Result
Not assessed	Not assessed	Not assessed	not assessed

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)
Zbiornik Jeziorsko	Special Protection Area (Birds Directive)	10,186	protected area overlaps with site	8,330
Uniejowski	Obszar Chronionego Krajobrazu	14,980	protected area overlaps with site	0
Nadwarciański	Obszar Chronionego Krajobrazu	29,597	protected area overlaps with site	0
Jeziorsko	Rezerwat Przyrody	1,968	protected area overlaps with site	0

Habitat (IUCN level 1)	Habitat detail	Extent (% of site)
Grassland	Mesophile grasslands	-
Wetlands (inland)	Standing freshwater, Raised bogs, Water fringe vegetation	-

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: Jeziorsko reservoir. Downloaded from http://datazone.birdlife.org/site/factsheet/jeziorsko-reservoir-iba-poland on 06/12/2023.