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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 (1996–1997)	150 birds	C2
Tundra Swan Cygnus columbianus	LC	passage (1992)	1,526 birds	A4i, B1i, C2
Corncrake Crex crex	LC	breeding (1998)	31 pairs	A1, C1, C6
Spotted Crake Porzana porzana	LC	resident (1998)	7 pairs	C6
Common Crane Grus grus	LC	resident (1998)	6 pairs	C6
White Stork Ciconia ciconia	LC	breeding (1994)	20 pairs	C6
Eurasian Bittern Botaurus stellaris	LC	breeding (1996–1997)	present	C2, C6
Eurasian Golden Plover Pluvialis apricaria	LC	passage (1998)	6,000–12,000 birds	A4i, B1i, C2, C6
Ruff Calidris pugnax	LC	breeding (1996–1997)	present	C6
Black Tern Chlidonias niger	LC	breeding (1996–1997)	4 pairs	C6
Short-eared Owl Asio flammeus	LC	breeding (1996–1997)	present	C6
Western Marsh-harrier Circus aeruginosus	LC	breeding (1996–1997)	present	C6
Montagu's Harrier Circus pygargus	LC	breeding (1996–1997)	12 pairs	C6
Hen Harrier Circus cyaneus	LC	non-breeding (1996–1997)	1 birds	C6
Bluethroat Luscinia svecica	LC	breeding (1996–1997)	present	C6

Year	Protected Area	Designation (management category)	% coverage of IBA
1932	Tetenhusener Moor	Naturschutzgebiet (IV)	<1
1939	Kiesgrube bei Altenkamp	Landschaftschutzgebiet (V)	<1
1976	Delver Koog	Naturschutzgebiet (IV)	<1
1976	Lundener Niederung mit Mötjensee und Steller See	Landschaftschutzgebiet (V)	2
1980	Großes Moor/Kätner Moor	Landschaftschutzgebiet (V)	<1
1984	Wildes Moor bei Stinstedt	Naturschutzgebiet (IV)	1
1988	Südermoor bei Schwienhusen	Landschaftschutzgebiet (V)	<1
1988	Wald bei Hollingstedt	Landschaftschutzgebiet (V)	<1
1989	Dellstedter Birkwildmoor	Naturschutzgebiet (IV)	1
1990	Hennstedter Moor	Landschaftschutzgebiet (V)	1
1992	Wildes Moor bei Schwabstedt	Naturschutzgebiet (IV)	1
1995	Hohner See	Naturschutzgebiet (IV)	1
2001	Eider-Sorge Niederung	Landschaftschutzgebiet (V)	7
2007	Schleife	Naturschutzgebiet (IV)	1
2009	Alte Sorge-Schleife	Naturschutzgebiet (IV)	1
2011	Lundener Niederung	Naturschutzgebiet (IV)	1
2011	Lundener Niederung westlich des Umleitungsvorfluters	Landschaftschutzgebiet (V)	<1

Habitat	% of IBA	Habitat detail
Artificial/Terrestrial	-	Highly improved re-seeded landscapes; Arable land
Forest	-	Broadleaved deciduous woodland
Grassland	-	Humid grasslands; Mesophile grasslands
Wetlands (inland)	-	Rivers and streams; Raised bogs; Water fringe vegetation

Land use	% of IBA
agriculture	80
nature conservation and research	14

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Lowlands of the Rivers Eider, Treene and Sorge (Germany). Downloaded from https://datazone.birdlife.org/site/factsheet/lowlands-of-the-rivers-eider-treene-and-sorge-iba-germany on 23/12/2024.