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The site was identified as important 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 List1	Season	Year(s)	Size	IBA criteria
Whooper Swan Cygnus cygnus	LC	winter	1996-1997	150 individuals	C2
Tundra Swan Cygnus columbianus	LC	passage	1992	1,526 individuals	A4i, B1i, C2
Corncrake Crex crex	LC	breeding	1998	31 breeding pairs	A1, C1, C6
Spotted Crake Porzana porzana	LC	resident	1998	7 breeding pairs	C6
Common Crane Grus grus	LC	resident	1998	6 breeding pairs	C6
White Stork Ciconia ciconia	LC	breeding	1994	20 breeding 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 individuals	A4i, B1i, C2, C6
Ruff Calidris pugnax	LC	breeding	1996-1997	present	C6
Black Tern Chlidonias niger	LC	breeding	1996-1997	4 breeding 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 breeding pairs	C6
Hen Harrier Circus cyaneus	LC	non-breeding	1996-1997	1 individuals	C6
Bluethroat Luscinia svecica	LC	breeding	1996-1997	present	C6

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2002) may differ.

Year	Protected Area	Designation	% overlap with IBA
1932	Tetenhusener Moor	Naturschutzgebiet	<1
1939	Kiesgrube bei Altenkamp	Landschaftschutzgebiet	<1
1976	Delver Koog	Naturschutzgebiet	<1
1976	Lundener Niederung mit Mötjensee und Steller See	Landschaftschutzgebiet	2
1980	Großes Moor/Kätner Moor	Landschaftschutzgebiet	<1
1984	Wildes Moor bei Stinstedt	Naturschutzgebiet	1
1988	Südermoor bei Schwienhusen	Landschaftschutzgebiet	<1
1988	Wald bei Hollingstedt	Landschaftschutzgebiet	<1
1989	Dellstedter Birkwildmoor	Naturschutzgebiet	1
1990	Hennstedter Moor	Landschaftschutzgebiet	1
1992	Wildes Moor bei Schwabstedt	Naturschutzgebiet	1
1995	Hohner See	Naturschutzgebiet	1
1999	Wälder bei Bergenhusen	Site of Community Importance (Habitats Directive)	<1
2001	Eider-Sorge Niederung	Landschaftschutzgebiet	7
2004	Eider-Treene-Sorge-Niederung	Special Protection Area (Birds Directive)	25
2004	Moore der Eider-Treene-Sorge-Niederung	Site of Community Importance (Habitats Directive)	5
2004	Treene Winderatter See bis Friedrichstadt und Bollingstedter Au	Site of Community Importance (Habitats Directive)	2
2004	Wälder der Ostenfelder Geest	Site of Community Importance (Habitats Directive)	1
2004	Untereider	Site of Community Importance (Habitats Directive)	<1
2004	Wald bei Hollingstedt	Site of Community Importance (Habitats Directive)	<1
2004	Lundener Niederung	Site of Community Importance (Habitats Directive)	2
2004	Kleiner Geestrücken südlich Dörpling	Site of Community Importance (Habitats Directive)	<1
2004	Gräben der nördlichen Alten Sorge	Site of Community Importance (Habitats Directive)	1
2007	Schleife	Naturschutzgebiet	1
2009	Alte Sorge-Schleife	Naturschutzgebiet	1
2011	Lundener Niederung	Naturschutzgebiet	1
2011	Lundener Niederung westlich des Umleitungsvorfluters	Landschaftschutzgebiet	<1

Habitat1	Habitat detail	% of IBA
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	-

1. IUCN Habitat classification.

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 22/11/2024.