Marshy valley of the Drweca river (Poland) IBA | Details

PL055

Marshy valley of the Drweca river

Current view: Data table and detailed info

IBA Justification

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 ('triggering') IBA criteria.

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

Species	Red List	Season (year/s of estimate)	Size	IBA criteria
Bean Goose Anser fabalis	LC	passage (2004–2009)	3,300 birds	C7
Greater White-fronted Goose Anser albifrons	LC	passage (2004–2009)	7,000 birds	C7
A4iii Species group - waterbirds	n/a	passage (2004–2009)	5,000–20,000 birds	C4

IBA Conservation

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2010. The most recent assessment (2011) is shown below.

IBA conservation assessment
Year of assessment	State	Pressure	Response
2011	poor	not assessed	not assessed
Whole site assessed?	State assessed by	Accuracy of information
yes	population	good

State (condition of the trigger species' populations)
Species	Actual vs Reference (units)	% remaining	Result
Common Crane Grus grus	21 / 20 (pairs)	100	good
Lesser Spotted Eagle Clanga pomarina	1 / 2 (pairs)	50	poor

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

IBA Protection

Year	Protected Area	Designation (management category)	% coverage of IBA
1961	Rzeka Drwęca	Rezerwat Przyrody (IV)	2
1961	Drweca	Nature Reserve (IV)	41
1985	Brodnicki Park Krajobrazowy	Park Krajobrazowy (V)	48

Habitats

Habitat	% of IBA	Habitat detail
Forest	44	Broadleaved deciduous woodland; Native coniferous woodland; Mixed woodland; Alluvial and very wet forest
Grassland	41	Steppes and dry calcareous grassland; Humid grasslands; Mesophile grasslands
Artificial/Terrestrial	11	Highly improved re-seeded landscapes; Arable land; Ruderal land
Wetlands (inland)	4	Standing freshwater; Rivers and streams; Raised bogs; Water fringe vegetation; Fens, transition mires and springs

Land use

Land use	% of IBA
forestry	40
agriculture	30
not utilised	30
hunting	-

Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Marshy valley of the Drweca river (Poland). Downloaded from https://datazone.birdlife.org/site/factsheet/marshy-valley-of-the-drweca-river-iba-poland on 26/12/2024.