• Summary
• Text account
• Data table and detailed info
• Map
• Reference and further resources

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	passage	1992	220 individuals	C2, C6
Tundra Swan Cygnus columbianus	LC	passage	1993	392 individuals	A4i, B1i, C2
Corncrake Crex crex	LC	breeding	1997	1 breeding pairs	C6
Spotted Crake Porzana porzana	LC	breeding	1997	2-3 breeding pairs	C6
Eurasian Bittern Botaurus stellaris	LC	winter	1995	1 individuals	C2, C6
Eurasian Golden Plover Pluvialis apricaria	LC	passage	1989	250 individuals	C6
Black-tailed Godwit Limosa limosa	NT	breeding	2001	118-120 breeding pairs	B2
Ruff Calidris pugnax	LC	passage	1989	110 individuals	C6
Ruff Calidris pugnax	LC	breeding	1995	2 breeding pairs	C6
Wood Sandpiper Tringa glareola	LC	passage	1993	3 individuals	C6
Short-eared Owl Asio flammeus	LC	breeding	1997	1 breeding pairs	C6
Short-eared Owl Asio flammeus	LC	winter	1989	3 individuals	C6
Western Marsh-harrier Circus aeruginosus	LC	breeding	1997	11 breeding pairs	C6
Peregrine Falcon Falco peregrinus	LC	resident	1997	1 breeding pairs	C6
Bluethroat Luscinia svecica	LC	breeding	1997	4 breeding pairs	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
-	Blockland -- Untere Wumme -- Westliches Hollerland	Landscape Protected Area	-
1968	Blockland - Burgdammer Wiesen	Landschaftschutzgebiet	82
1968	Borgfeld-Timmersloh, Warf, Kuhweide	Landschaftschutzgebiet	1
1968	Bremen 1968 36. Änderung	Landschaftschutzgebiet	83
1984	Kuhgrabensee 1. Änderungsverordnung	Naturschutzgebiet	1
1988	Untere Wümme	Naturschutzgebiet	4
1991	Westliches Hollerland (Leher Feld) 2. Änderungsverordnung	Naturschutzgebiet	8
1991	Untere Wümme 1. Änderungsverordnung	Naturschutzgebiet	4
1998	Untere Wümme	Site of Community Importance (Habitats Directive)	1
2000	Kuhgrabensee	Site of Community Importance (Habitats Directive)	1
2000	Grambker Feldmarksee	Site of Community Importance (Habitats Directive)	1
2000	Zentrales Blockland	Site of Community Importance (Habitats Directive)	31
2004	Hollerland	Site of Community Importance (Habitats Directive)	8
2004	Lesum	Site of Community Importance (Habitats Directive)	1
2008	Blockland	Special Protection Area (Birds Directive)	82
2009	Grambker Feldmarksee	Naturschutzgebiet	1
2012	Hollerland	Special Protection Area (Birds Directive)	7

Habitat1	Habitat detail	% of IBA
Grassland	Humid grasslands	80
Wetlands (inland)	Standing freshwater, Rivers and streams, Water fringe vegetation	15
Forest	Alluvial and very wet forest	5
Marine Neritic		minor (<10)

1. IUCN Habitat classification.

Land use	% of IBA
agriculture	80
hunting	80
nature conservation and research	20
water management	15
tourism/recreation	10

---

Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Blockland - lower Wümme valley - Westliches Hollerland (Germany). Downloaded from https://datazone.birdlife.org/site/factsheet/blockland--lower-wümme-valley--westliches-hollerland-iba-germany on 23/11/2024.