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The site was identified as internationally important for bird conservation in 2002 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
Whooper Swan Cygnus cygnus	LC	winter (1990)	34 birds	C2
Greylag Goose Anser anser	LC	passage (1980–1989)	2,200 birds	B1i, C3
Bean Goose Anser fabalis	LC	passage (1990–1999)	10,200 birds	A4i, B1i, C3
Greater White-fronted Goose Anser albifrons	LC	passage (1990–1999)	8,334 birds	B1i, C3
Northern Shoveler Spatula clypeata	LC	winter (1990–2000)	1,876 birds	B1i, C3
Mallard Anas platyrhynchos	LC	winter (1990–1999)	36,566 birds	C3
Common Teal Anas crecca	LC	winter (1990–1999)	4,224 birds	B1i, C3
Corncrake Crex crex	LC	breeding (1990–1999)	23 pairs	A1, C1
Spotted Crake Porzana porzana	LC	breeding (1990–1999)	14 pairs	C6
Eurasian Bittern Botaurus stellaris	LC	breeding (1990–1999)	2 pairs	C6
Black Tern Chlidonias niger	LC	breeding (1990–1999)	57 pairs	B2, C2, C6
Black Tern Chlidonias niger	LC	winter (1990–1999)	125 birds	C2, C6
Hen Harrier Circus cyaneus	LC	winter (1990–1999)	200 birds	C6
A4iii Species group - waterbirds	n/a	passage (1987–1996)	20,734 birds	A4iii, C4
A4iii Species group - waterbirds	n/a	winter (1990–1997)	42,825 birds	A4iii, C4

Year	Protected Area	Designation (management category)	% coverage of IBA
1961	Dümmer	Naturschutzgebiet (IV)	12
1971	Hohe Sieben	Naturschutzgebiet (IV)	2
1971	Ochsenbruch	Landschaftschutzgebiet (V)	1
1972	Dümmer	Nature Park (V)	100
1981	Dümmer	Landschaftschutzgebiet (V)	2
1981	Dümmer	Landschaftschutzgebiet (V)	<1
1990	Haverbeker Moor	Landschaftschutzgebiet (V)	<1
1995	Ochsenmoor	Naturschutzgebiet (IV)	21
2007	Westliche Dümmerniederung	Naturschutzgebiet (IV)	28
2007	Huntebruch und Huntebruchwiesen	Naturschutzgebiet (IV)	5
2015	Dümmer	Landschaftschutzgebiet (V)	22

Habitat	% of IBA	Habitat detail
Grassland	-	Humid grasslands
Wetlands (inland)	-	Standing freshwater; Fens, transition mires and springs

Land use	% of IBA
agriculture	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Dümmer (Germany). Downloaded from https://datazone.birdlife.org/site/factsheet/dümmer-iba-germany on 23/12/2024.