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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'):

Species	Current IUCN Red List Category	Season	Year(s)	Population estimate at site	IBA criteria met
Common Pochard Aythya ferina	VU	winter	1990-2000	11,941 individuals	B1i, C3
Ferruginous Duck Aythya nyroca	NT	winter	1987	1 individuals	C6
Tufted Duck Aythya fuligula	LC	winter	1990-2000	25,359 individuals	A4i, C3
Northern Shoveler Spatula clypeata	LC	winter	1990-2000	500 individuals	B1i, C3
Gadwall Mareca strepera	LC	breeding	1990-2000	200 breeding pairs	B2
Gadwall Mareca strepera	LC	winter	1990-2000	500 individuals	B1i, C3
Spotted Crake Porzana porzana	LC	breeding	1990-2000	5 breeding pairs	C6
Little Crake Zapornia parva	LC	breeding	1990-2000	2 breeding pairs	C6
Common Little Bittern Ixobrychus minutus	LC	breeding	1990-2000	4 breeding pairs	C6
Black-crowned Night-heron Nycticorax nycticorax	LC	breeding	1990-2000	30 breeding pairs	C6
Purple Heron Ardea purpurea	LC	breeding	1990-2000	1 breeding pairs	C6
Great White Egret Ardea alba	LC	passage	1990-2000	70 individuals	C6
Little Egret Egretta garzetta	LC	breeding	1990-2000	2 breeding pairs	C6
Great Cormorant Phalacrocorax carbo	LC	winter	1990-2000	1,668 individuals	B1i, C3
Wood Sandpiper Tringa glareola	LC	passage	1987	100 individuals	C6
Mediterranean Gull Larus melanocephalus	LC	breeding	1990-2000	3 breeding pairs	C6
Common Tern Sterna hirundo	LC	breeding	1990-2000	12 breeding pairs	C6
Short-eared Owl Asio flammeus	LC	passage	1987	1 individuals	C6
Western Marsh-harrier Circus aeruginosus	LC	breeding	1990-2000	25 breeding pairs	C6
Red Kite Milvus milvus	LC	breeding	1990-2000	6 breeding pairs	C6
Milvus migrans	NR	breeding	1990-2000	17 breeding pairs	C6
Common Kingfisher Alcedo atthis	LC	breeding	1990-2000	31 breeding pairs	C6
Aquatic Warbler Acrocephalus paludicola	VU	passage	1987	1 individuals	C6
Bluethroat Luscinia svecica	LC	breeding	1990-2000	750 breeding pairs	C6
A4iii Species group - waterbirds	n/a	winter	1990-1998	39,969 individuals	A4iii, C4

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2002).

Protected area (PA)	PA designation	PA area (ha)	Relationship of PA with IBA	Overlap of PA with IBA (ha)
Wälder im Donautal	Site of Community Importance (Habitats Directive)	1,285	protected area contained by site	0
Wälder im Donautal	Special Protection Area (Birds Directive)	1,289	protected area contained by site	1,222
Vogelfreistätte Graureiherkolonie bei Kleinschwarzach	Naturschutzgebiet	63	protected area contained by site	63
Verordnung über die Landschaftsschutzgebiete im Landkreis Regensburg	Landschaftschutzgebiet	55,972	protected area overlaps with site	0
Stöcklwörth	Naturschutzgebiet	69	protected area contained by site	69
Schutzverordnung im Landkreis Regensburg	Landscape Protection Area	55,896	protected area overlaps with site	3,750
Schutz von Landschaftsteilen an der Isar und deren Mündungsgebiet im Landkreis Deggendorf (LSG Untere Isar)	Landschaftschutzgebiet	3,283	protected area overlaps with site	0
Schutz von Landschaftsteilen an der Isar und deren Mündungsgebiet im Landkreis Deggendorf (LSG Untere Isar)	Landscape Protection Area	3,283	protected area overlaps with site	199
Runstwiesen und Totenmoos	Naturschutzgebiet	149	protected area contained by site	149
Polder Straubing	Landschaftschutzgebiet	423	protected area overlaps with site	0
Polder Straubing	Landscape Protection Area	423	protected area overlaps with site	74
Pfatterer Au	Naturschutzgebiet	346	protected area contained by site	344
Öberauer Donauschleife	Naturschutzgebiet	291	protected area contained by site	291
LSG Donauengtal Gelbersdorf-Windorf-Otterskirchen mit Donauinseln	Landschaftschutzgebiet	699	protected area overlaps with site	0
LSG Donauengtal Gelbersdorf-Windorf-Otterskirchen mit Donauinseln	Landscape Protection Area	699	protected area overlaps with site	69
LSG Bayerischer Wald	Landscape Protection Area	231,460	protected area overlaps with site	3,096
LSG Bayerischer Wald	Landschaftschutzgebiet	230,946	protected area overlaps with site	0
Isarmündung	Site of Community Importance (Habitats Directive)	1,892	protected area is adjacent to site	0
Isarmündung	Naturschutzgebiet	808	protected area is adjacent to site	0
Isarmündung	Special Protection Area (Birds Directive)	2,132	protected area is adjacent to site	0
Gmünder Au	Naturschutzgebiet	182	protected area contained by site	180
Donauauen zwischen Straubing und Vilshofen	Site of Community Importance (Habitats Directive)	4,721	protected area contained by site	3,735
Donauauen bei Stadldorf	Naturschutzgebiet	90	protected area contained by site	90
Donaualtwasser Winzerer Letten	Naturschutzgebiet	62	protected area contained by site	62
Donaualtwasser Staatshaufen	Naturschutzgebiet	58	protected area contained by site	58
Donau zwischen Straubing und Vilshofen	Special Protection Area (Birds Directive)	6,914	protected area contained by site	5,539
Donau zwischen Regensburg und Straubing	Special Protection Area (Birds Directive)	3,276	protected area overlaps with site	2,485
Donau und Altwässer zwischen Regensburg und Straubing	Site of Community Importance (Habitats Directive)	2,262	protected area overlaps with site	1,773
Bayerischer Wald	Nature Park	203,858	protected area overlaps with site	4,292
Autal	Naturschutzgebiet	45	unknown	0

Habitat (IUCN level 1)	Habitat detail	Extent (% of site)
Forest	Alluvial and very wet forest	-
Wetlands (inland)	Standing freshwater, Water fringe vegetation	-

For more information about the IUCN Habitat classification, please click here.

Land-use	Extent (% of site)
agriculture	-
forestry	-
fisheries/aquaculture	-
hunting	-
tourism/recreation	-
urban/industrial/transport	-

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Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Danube valley: Regensburg-Vilshofen. Downloaded from http://datazone.birdlife.org/site/factsheet/danube-valley:-regensburg-vilshofen-iba-germany on 30/09/2023.