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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 IBA criteria.

Populations meeting IBA criteria ('key species') at the site:

Species	Red List	Season (year/s of estimate)	Size	IBA criteria
Common Crane Grus grus	LC	passage (2009)	3,500 individuals	C2
Black-tailed Godwit Limosa limosa	NT	breeding (2005)	10 breeding pairs	C1
Aquatic Warbler Acrocephalus paludicola	VU	breeding (2007–2009)	169–182 males	C1, C6

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 key species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Energy production and mining	happen­ing now	whole popul­ation/area (>90%)	moderate deteri­oration (10–30% in 3 gener­ations)	very high

Response (conservation actions taken for the key species and/or their habitats)
Designation	Planning	Action	Result
Not assessed	Not assessed	Not assessed	not assessed

Year	Protected Area	Designation (management category)	% coverage of IBA
1990	Poleski Park Narodowy	Park Narodowy (II)	90
1991	Bagno Bubnów	Nature Reserve (-)	63

Habitat	% of IBA	Habitat detail
Wetlands (inland)	53	Standing freshwater; Water fringe vegetation; Fens, transition mires and springs
Artificial/Terrestrial	18
Forest	15	Alluvial and very wet forest
Grassland	14	Steppes and dry calcareous grassland; Humid grasslands

Land use	% of IBA
nature conservation and research	100

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Recommended citation
BirdLife International (2025) Important Bird Area factsheet: Bubnow Marsh (Poland). Downloaded from https://datazone.birdlife.org/site/factsheet/bubnow-marsh-iba-poland on 06/01/2025.