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Location Lithuania, Kaunas
Central coordinates 24o 8.00' East  54o 51.00' North
IBA criteria B2, B3, C1, C6
Area 6,323 ha
Altitude 40 - 70m
Year of IBA assessment 2004

Lietuvos Ornitologu Draugija (Affiliate)

Site description This site covers the upper part of a reservoir used for generating hydroelectric power, and includes some islands as well as surrounding forests, swamps and meadows.

Key Biodiversity There are important numbers of breeding Botaurus stellaris and Alcedo atthis. Breeding species of global conservation concern that do not meet IBA criteria: Haliaeetus albicilla (1-2 pairs) and Crex crex (a few calling males). Other notable breeding species include Aythya ferina (min. 20 pairs) and Dendrocopos medius (min. 6 pairs).

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Common Pochard Aythya ferina breeding  1999  50 breeding pairs  unknown  B3  Vulnerable 
Eurasian Bittern Botaurus stellaris breeding  1998  15 breeding pairs  unknown  B2  Least Concern 
Black Kite Milvus migrans breeding  2001  9 breeding pairs  C6  Least Concern 
White-tailed Sea-eagle Haliaeetus albicilla winter  2001  10 individuals  C1  Least Concern 
Little Crake Zapornia parva breeding  2001  5 breeding pairs  C6  Least Concern 
Common Kingfisher Alcedo atthis breeding  1997  15-20 breeding pairs  medium  B2  Least Concern 
Common Kingfisher Alcedo atthis breeding  2001  20-25 breeding pairs  C6  Least Concern 
Middle Spotted Woodpecker Leiopicus medius breeding  1999  8 breeding pairs  unknown  B3  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Kauno marios Regional Park 10,173 protected area overlaps with site 6,000  
Ornithological Reserve of the Kaunas municipality Ornithological Reserve 0 protected area overlaps with site 323  


IUCN habitat Habitat detail Extent (% of site)
Forest Alluvial and very wet forest; Broadleaved deciduous woodland; Mixed woodland; Native coniferous woodland; Treeline ecotone  16%
Artificial - terrestrial Arable land; Other urban and industrial areas; Perennial crops, orchards and groves; Urban parks and gardens  2%
Grassland   1%
Wetlands (inland) Fens, transition mires and springs; Rivers and streams; Standing freshwater; Water fringe vegetation  82%

Land use

Land-use Extent (% of site)
fisheries/aquaculture major
forestry minor
tourism/recreation -
water management -
nature conservation and research -

Protection status National High International None10,173 ha of IBA covered by Regional Park (Kauno Marios, 10,173 ha).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Kauno Marios water reservoir & eastern coastal zone. Downloaded from on 20/10/2016

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