Marshy valley of the Drweca river (Poland)

PL055

Marshy valley of the Drweca river

Current view: Data table and detailed info

IBA Justification

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
Bean Goose Anser fabalis	LC	passage	2004-2009	3,300 individuals	C7
Greater White-fronted Goose Anser albifrons	LC	passage	2004-2009	7,000 individuals	C7
A4iii Species group - waterbirds	n/a	passage	2004-2009	5,000-20,000 individuals	C4

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2010) may differ.

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	unfavourable	not assessed	not assessed
Whole site assessed?	State assessed by	Accuracy of information
yes	population	good

State (condition of the trigger species' populations)
Species	Reference	Actual	Units	% remaining	Result
Common Crane Grus grus	20	21	breeding pairs	100	favourable
Lesser Spotted Eagle Clanga pomarina	2	1	breeding pairs	50	unfavourable

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Not assessed	Not assessed	Not assessed	not assessed

IBA Protection

Year	Protected Area	Designation	% overlap with IBA
1961	Rzeka Drwęca	Rezerwat Przyrody	2
1961	Drweca	Nature Reserve	41
1985	Brodnicki Park Krajobrazowy	Park Krajobrazowy	48
1992	Doliny Drwęcy	Obszar Chronionego Krajobrazu	100
1998	Dolina Dolnej Drwęcy	Obszar Chronionego Krajobrazu	-
2007	Bagienna Dolina Drwęcy	Special Protection Area (Birds Directive)	100
2007	Dolina Drwęcy	Site of Community Importance (Habitats Directive)	26

Habitats

Habitat¹	Habitat detail	% of IBA
Forest	Broadleaved deciduous woodland, Native coniferous woodland, Mixed woodland, Alluvial and very wet forest	44
Grassland	Steppes and dry calcareous grassland, Humid grasslands, Mesophile grasslands	41
Artificial/Terrestrial	Highly improved re-seeded landscapes, Arable land, Ruderal land	11
Wetlands (inland)	Standing freshwater, Rivers and streams, Raised bogs, Water fringe vegetation, Fens, transition mires and springs	4

1. IUCN Habitat classification.

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 22/11/2024.