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close| Location | Austria, Oberösterreich |
| Central coordinates | 13o 12.00' East 48o 18.00' North |
| IBA criteria | C6 |
| Area | 1,699 ha |
| Altitude | 317 - 345m |
| Year of IBA assessment | 2009 |
Ornithological information An important site for breeding waterbirds and passage waders. The site holds 20,000 or more waterbirds, on a regular basis.
Site description The four storage lakes were built between 1938-1961 along the River Inn. High rates of sedimentation have allowed rapid colonization of water-fringe vegetation, especially reedbeds (Phragmites), and alluvial woodland, dominated by willow Salix. When water-levels are low, large areas of mudflats are exposed.
Populations of IBA trigger species
| Species | Season | Period | Population estimate | Quality of estimate | IBA Criteria | IUCN Category |
|---|---|---|---|---|---|---|
| Black-crowned Night-heron Nycticorax nycticorax | breeding | 2001-2005 | 28-51 breeding pairs | good | C6 | Least Concern |
| Western Marsh-harrier Circus aeruginosus | breeding | 1997-2005 | 4-6 breeding pairs | good | C6 | Least Concern |
| Mediterranean Gull Larus melanocephalus | breeding | 1997-2003 | 3-13 breeding pairs | good | C6 | Least Concern |
| Bluethroat Luscinia svecica | breeding | 2000-2005 | 5-9 breeding pairs | good | C6 | Least Concern |
Protected areas
| Protected area | Designation | Area (ha) | Relationship with IBA | Overlap with IBA (ha) | |
|---|---|---|---|---|---|
| NSG Untere Inn | Birds Directive | 870 | protected area contained by site | 870 |
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| Stauseen am Unteren Inn | Wetlands of International Importance (Ramsar) | 870 | protected area contained by site | 870 |
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| Unterer Inn | Nature Reserve | 870 | protected area contains site | 870 |
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Habitats
| IUCN habitat | Habitat detail | Extent (% of site) |
|---|---|---|
| Forest | Alluvial and very wet forest | 15% |
| Wetlands (inland) | Rivers and streams; Water fringe vegetation | 85% |
Land use
| Land-use | Extent (% of site) |
|---|---|
| tourism/recreation | 20% |
| not utilised | 70% |
| forestry | 10% |
Management considerations The main threats are disturbance from angling and hunting, and from recreational activities.
Protection status National High International High870 ha of IBA covered by Nature Reserve (Unterer Inn, 870 ha). 870 ha of IBA covered by Ramsar Site (Stauseen am Unteren Inn, 870 ha). 870 ha of IBA covered by Special Protection Area (Unterer Inn, 870 ha).
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Recommended citation BirdLife International (2013) Important Bird Areas factsheet: Storage lakes on the lower Inn. Downloaded from http://www.birdlife.org on 19/06/2013
To provide new information to update this factsheet or to correct any errors, please email BirdLife
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