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Year of most recent IBA criteria assessment: 2002

Populations of IBA trigger species

Species	Current IUCN Red List Category	Season	Year(s) of estimate	Population estimate	IBA Criteria Triggered
Whooper Swan Cygnus cygnus	LC	winter	1990-1999	61 individuals	C2
Tundra Swan Cygnus columbianus	LC	winter	1990-1999	273 individuals	A4i, B1i, B2, C2
Barnacle Goose Branta leucopsis	LC	passage	1992	45 individuals	C2
Northern Shoveler Spatula clypeata	LC	winter	1980-1989	760 individuals	B1i
Corncrake Crex crex	LC	breeding	1990-1999	76 breeding pairs	A1, B2, C1, C2, C6
Montagu's Harrier Circus pygargus	LC	breeding	1990-1999	4 breeding pairs	C6

Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.

For more information about the IBA assessment process and criteria please click here

Protected Area	Designation	Area (ha)	Relationship with IBA	Overlap with IBA (ha)
Worpswede	Landschaftschutzgebiet	1,913	protected area overlaps with site	556
Wiesen und Weiden nordöstlich des Breiten Wassers	Naturschutzgebiet	154	protected area contained by site	153
Untere Wümmeniederung; untere Hammeniederung mit Teufelsmoor	Site of Community Importance (Habitats Directive)	4,153	protected area overlaps with site	2,889
Torfkanal und Randmoore	Naturschutzgebiet	196	protected area contained by site	197
Pennigbütteler Moor	Naturschutzgebiet	177	protected area overlaps with site	4
Moor bei Niedersandhausen	Naturschutzgebiet	254	protected area overlaps with site	25
Hammewiesen	Landschaftschutzgebiet	1,137	protected area overlaps with site	974
Hammeniederung	Special Protection Area (Birds Directive)	6,296	protected area contained by site	6,296
Hamme-Altarm	Naturschutzgebiet	4	protected area contained by site	4
Hamberger Moor	Landschaftschutzgebiet	288	protected area overlaps with site	130
Breites Wasser	Naturschutzgebiet	210	protected area contained by site	203

IUCN Habitat	Habitat detail	Extent (% of site)
Grassland	Humid grasslands	-
Wetlands (inland)	Standing freshwater, Rivers and streams, Raised bogs	-

For further information about the habitat classification please click here.

Land-use	Extent (% of site)
agriculture	-

For further information about the land use classification please click here.

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Recommended citation
BirdLife International (2023) Important Bird Areas factsheet: Hamme lowlands. Downloaded from http://www.birdlife.org on 21/03/2023.