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Year of most recent IBA criteria assessment: 2010

Populations of IBA trigger species

Species	Current IUCN Red List Category	Season	Year(s) of estimate	Population estimate	IBA Criteria Triggered
Bean Goose Anser fabalis	LC	passage	2004-2008	29,500 individuals	C3
Mallard Anas platyrhynchos	LC	passage	1995-2003	23,000 individuals	C3
Mediterranean Gull Larus melanocephalus	LC	breeding	2004-2009	3-9 breeding pairs	C6
Common Tern Sterna hirundo	LC	breeding	2008	186 breeding pairs	C6
A4iii Species group - waterbirds	n/a	passage	2004-2008	30,000 individuals	C4

Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.

For more information about the IBA assessment process and criteria please click here

Threats to the site (pressure)
Threat Level 1	Threat Level 2	Timing	Scope	Severity	Result
Biological resource use	hunting & collecting terrestrial animals - intentional use (species being assessed is the target)	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Human intrusions and disturbance	recreational activities	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Invasive and other problematic species and genes	invasive non-native/alien species/diseases - unspecified species	happening now	whole area/population (>90%)	moderate to rapid deterioration	very high
Natural system modifications	dams & water management/use - dams (size unknown)	happening now	whole area/population (>90%)	very rapid to severe deterioration	very high
Natural system modifications	fire & fire suppression - increase in fire frequency/intensity	happening now	majority/most of area/population (50-90%)	no or imperceptible deterioration	low
Pollution	domestic & urban waste water - type unknown/unrecorded	happening now	some of area/population (10-49%)	no or imperceptible deterioration	low
Pollution	excess energy - noise pollution	happening now	some of area/population (10-49%)	no or imperceptible deterioration	low
Residential and commercial development	tourism and recreation areas	happening now	some of area/population (10-49%)	no or imperceptible deterioration	low

Condition of key/trigger populations (state)
Scientific	Common	TargetPop	ActualPop	Units	Remaining	Result
Larus ridibundus	Black-headed Gull	4410	4410	breeding pairs	100	favourable
Larus melanocephalus	Mediterranean Gull	9	9	breeding pairs	100	favourable
Sterna hirundo	Common Tern	186	186	breeding pairs	100	favourable

Conservation actions taken at site (response)
Conservation Designation	Management Planning	Conservation Action	Result
Most of site (50-90%) covered (including the most critical parts for important bird species)	No management planning has taken place	Some limited conservation initiatives are in place	low

For more information about IBA monitoring please click here

Protected Area	Designation	Area (ha)	Relationship with IBA	Overlap with IBA (ha)
Zbiornik Nyski	Special Protection Area (Birds Directive)	2,128	protected area overlaps with site	1,814
Otmuchowsko - Nyski Obszar Chronionego Krajobrazu	Obszar Chronionego Krajobrazu	13,389	protected area contains site	0

IUCN Habitat	Habitat detail	Extent (% of site)
Wetlands (inland)	Standing freshwater, Water fringe vegetation	-

For further information about the habitat classification please click here.

Land-use	Extent (% of site)
tourism/recreation	-
water management	-

For further information about the land use classification please click here.

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Recommended citation
BirdLife International (2023) Important Bird Areas factsheet: Nysa reservoir. Downloaded from http://www.birdlife.org on 20/03/2023.