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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

BirdLife Austria

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.

Key Biodiversity An important site for breeding waterbirds and passage waders. The site holds 20,000 or more waterbirds, on a regular basis.

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)  
Stauseen am Unteren Inn Wetlands of International Importance (Ramsar) 870 protected area contained by site 870  
Unterer Inn Nature Reserve 870 protected area contains site 870  


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%

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 (2016) Important Bird and Biodiversity Area factsheet: Storage lakes on the lower Inn. Downloaded from on 21/10/2016

To provide new information to update this factsheet or to correct any errors, please email BirdLife