Data Zone
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 | 1990-2000 | 130-197 individuals | C2, C6 |
| Common Goldeneye Bucephala clangula | LC | passage | 1990-2000 | 2,700-3,056 individuals | B1i, C3 |
| Red-crested Pochard Netta rufina | LC | breeding | 1990-2000 | 100-150 breeding pairs | B2 |
| Red-crested Pochard Netta rufina | LC | passage | 1990-2000 | 5,500-10,803 individuals | A4i, B1i, C3 |
| Common Pochard Aythya ferina | VU | passage | 1990-2000 | 32,000-44,450 individuals | A4i, B1i, C3 |
| Ferruginous Duck Aythya nyroca | NT | breeding | 1995 | 1 breeding pairs | C6 |
| Tufted Duck Aythya fuligula | LC | passage | 1990-2000 | 34,000-53,672 individuals | A4i, B1i, C3 |
| Northern Shoveler Spatula clypeata | LC | passage | 1990-2000 | 2,100-3,846 individuals | B1i, C3 |
| Gadwall Mareca strepera | LC | passage | 1990-2000 | 6,500-11,667 individuals | A4i, B1i, C3 |
| Northern Pintail Anas acuta | LC | non-breeding | 1990-2000 | 550-983 individuals | B1i, C3 |
| Common Teal Anas crecca | LC | passage | 1990-2000 | 4,200-11,000 individuals | B1i, C3 |
| Little Grebe Tachybaptus ruficollis | LC | non-breeding | 1990-2000 | 700-1,102 individuals | A4i, B1i, C3 |
| Spotted Crake Porzana porzana | LC | breeding | 1990-2000 | 5-15 breeding pairs | C6 |
| Spotted Crake Porzana porzana | LC | passage | 1993-2000 | 20 individuals | C6 |
| Little Crake Zapornia parva | LC | breeding | 1990-2000 | 3 breeding pairs | C6 |
| Eurasian Coot Fulica atra | LC | non-breeding | 1990-2000 | 47,070 individuals | A4i, B1i, C3 |
| Eurasian Bittern Botaurus stellaris | LC | breeding | 1990-2000 | 1 breeding pairs | C6 |
| Eurasian Bittern Botaurus stellaris | LC | passage | 1993-2000 | 9 individuals | C6 |
| Common Little Bittern Ixobrychus minutus | LC | breeding | 1990-2000 | 5-7 breeding pairs | C6 |
| Black-crowned Night Heron Nycticorax nycticorax | LC | breeding | 1990-2000 | 1 breeding pairs | C6 |
| Great White Egret Ardea alba | LC | passage | 1993-2000 | 9 individuals | C6 |
| Ruff Calidris pugnax | LC | non-breeding | 1990-2000 | 537 individuals | C6 |
| Wood Sandpiper Tringa glareola | LC | passage | 1990-2000 | 80 individuals | C6 |
| Black Tern Chlidonias niger | LC | passage | 1993-2000 | 200 individuals | C2, C6 |
| Common Tern Sterna hirundo | LC | breeding | 1990-2000 | 67 breeding pairs | C6 |
| Western Marsh-harrier Circus aeruginosus | LC | breeding | 1990-2000 | 3-5 breeding pairs | C6 |
| Western Marsh-harrier Circus aeruginosus | LC | passage | 1993-2000 | 10 individuals | C6 |
| Hen Harrier Circus cyaneus | LC | winter | 1990-2000 | 32 individuals | C6 |
| Black Kite Milvus migrans | LC | breeding | 1993-2000 | 10-30 breeding pairs | C6 |
| A4iii Species group - waterbirds | n/a | non-breeding | 1990-2000 | 48,857-49,692 individuals | A4iii, C4 |
| A4iii Species group - waterbirds | n/a | passage | 1991-2000 | 87,318-138,812 individuals | A4iii, C4 |
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 |
|---|---|---|---|
| - | Untersee of Lake Constance | Ramsar Site, Wetland of International Importance | 13 |
| 1938 | Halbinsel Mettnau | Naturschutzgebiet | 2 |
| 1938 | Bodenseeufer | Landschaftschutzgebiet | 1 |
| 1938 | Wollmatinger Ried - Untersee - Gnadensee | Naturschutzgebiet | 13 |
| 1941 | Stehlwiesen | Naturschutzgebiet | <1 |
| 1951 | Bodenseeufer | Landschaftschutzgebiet | <1 |
| 1954 | Insel Reichenau | Landschaftschutzgebiet | 1 |
| 1958 | Hornspitze auf der Höri | Naturschutzgebiet | 3 |
| 1961 | Bodenseeufer (Gmk. Gaienhofen, Horn, Gundholzen) | Naturschutzgebiet | 2 |
| 1961 | Bodenseeufer (Gmk. Öhningen) | Naturschutzgebiet | 6 |
| 1961 | Bodenseeufer (Gmk. Iznang, Moos, Böhringen) | Naturschutzgebiet | 1 |
| 1961 | Bodenseeufer (Gmk. Wangen, Hemmenhofen) | Naturschutzgebiet | 1 |
| 1961 | Bodenseeufer (Gmk. Allensbach, Hegne, Reichenau) | Naturschutzgebiet | <1 |
| 1973 | Radolfzeller Aachried | Naturschutzgebiet | 5 |
| 1976 | Bodensee: Wollmatinger Ried, Giehrenmoos & Mindelsee | Ramsar Site, Wetland of International Importance | 12 |
| 1980 | Wollmatinger Ried - Untersee - Gnadensee | Landschaftschutzgebiet | <1 |
| 1982 | Bodenseeufer auf Gemarkung Markelfingen | Naturschutzgebiet | <1 |
| 1996 | Radolfzeller Aachmündung | Naturschutzgebiet | 1 |
| 2004 | Bodanrück und westl. Bodensee | Site of Community Importance (Habitats Directive) | 43 |
| 2004 | Schiener Berg und westlicher Untersee | Site of Community Importance (Habitats Directive) | 27 |
| 2004 | Mettnau und Radolfzeller Aach unterhalb Singen | Site of Community Importance (Habitats Directive) | 20 |
| 2006 | Untersee des Bodensees | Special Protection Area (Birds Directive) | 91 |
| Habitat1 | Habitat detail | % of IBA |
|---|---|---|
| Forest | Alluvial and very wet forest | - |
| Grassland | Steppes and dry calcareous grassland, Humid grasslands, Mesophile grasslands | - |
| Shrubland | - | |
| Wetlands (inland) | Standing freshwater, Water fringe vegetation | - |
| Land use | % of IBA |
|---|---|
| fisheries/aquaculture | - |
| tourism/recreation | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Untersee of Lake Constance (Germany). Downloaded from
https://datazone.birdlife.org/site/factsheet/untersee-of-lake-constance-iba-germany on 25/11/2024.