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Location Czech Republic, Central Bohemia,South Bohemia
Central coordinates 14o 46.00' East  49o 0.00' North
IBA criteria A1, A4i, B1i, B2, B3, C1, C2, C3, C6
Area 47,360 ha
Altitude 410 - 550m
Year of IBA assessment 2002

Czech Society for Ornithology

Site description A flat basin bordered by hills, drained by the Luznice river, and containing a unique system of c.500 fish-ponds connected by a network of drains, canals and artificial streams. Many of the ponds support littoral vegetation, and there are remnants of wet meadows and Alnus riverine forest bordering the shores and watercourses. The region is an important source of gravel, sand and peat, and is highly suitable for recreation and tourism. This area includes three areas that were treated as subsites in the previous The Tøeboòsko IBA covers a part of the Tøeboòsko plateau between the cities of Veselí nad Lunicí and Èeské Velenice in the south-eastern part of Southern Bohemia on the border with Austria. The area has changed dramatically since the Middle Ages. The forests were logged, land drained and a complex of more than 500 fishponds of various sizes connected by a network of drains, canals and artificial streams (Nová øeka river, Zlatá stoka - Golden Canal) was created. Different types of biotopes of shallow ponds have since evolved at the original locations of primeval floodplain forests and wetlands, reaching a secondary ecological equilibrium. Other large wetlands lie in the floodplains of the Lunice and Nová øeka rivers. The numerous peatbogs are considered to be the most valuable ecosystems of Tøeboòsko. They originated during the last glaciation at sites with favourable conditions and limited permeability of the base. The prevailing types of forests are pine forests with spruce or oak; floodplain oakwoods and wetland alderwoods dominate the floodplains. Stands of Swiss Mountain Pine (Pinus rotundata) in peatbogs are also considered valuable.

Key Biodiversity The Trebon region is one of the most important areas for waterbirds in central Europe, with 10,000-20,000 individuals visiting the fish-ponds on autumn migration. More than 150 species nest within the IBA, including a variety of raptors, woodpeckers and forest passerines. Breeding species of global conservation concern that do not meet IBA criteria: Crex crex (7-15 pairs).

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Greylag Goose Anser anser passage  1998-2000  2,400-10,000 individuals  medium  A4i, B1i, C3  Least Concern 
Gadwall Mareca strepera passage  1998-2002  750-950 individuals  medium  A4i, B1i, C3  Least Concern 
Gadwall Mareca strepera breeding  1996-2000  950-1,000 breeding pairs  good  A4i, B1i, B2  Least Concern 
Northern Shoveler Spatula clypeata passage  1998-2002  480-1,300 individuals  good  C3  Least Concern 
Red-crested Pochard Netta rufina breeding  1996-2000  20-40 breeding pairs  good  B2  Least Concern 
Common Pochard Aythya ferina breeding  1996-2000  790 breeding pairs  good  B3  Vulnerable 
Black Stork Ciconia nigra breeding  1998-2002  10-15 breeding pairs  medium  B2, C6  Least Concern 
White Stork Ciconia ciconia breeding  1996-2000  10-15 breeding pairs  good  B2  Least Concern 
Black-crowned Night-heron Nycticorax nycticorax breeding  1998-2002  80-120 breeding pairs  good  B2, C6  Least Concern 
Great White Egret Ardea alba passage  1998-2002  380 individuals  good  C2  Least Concern 
European Honey-buzzard Pernis apivorus breeding  1998-2000  10-20 breeding pairs  medium  B3, C6  Least Concern 
White-tailed Sea-eagle Haliaeetus albicilla breeding  1998-2002  10-15 breeding pairs  good  A1, C1  Least Concern 
White-tailed Sea-eagle Haliaeetus albicilla winter  1998-2000  40-50 individuals  good  A1, C1  Least Concern 
Western Marsh-harrier Circus aeruginosus breeding  1998-2002  50-60 breeding pairs  good  C6  Least Concern 
Common Tern Sterna hirundo breeding  1998-2000  34-82 breeding pairs  good  C6  Least Concern 
Strix aluco resident  1998-2000  100-200 breeding pairs  medium  B3  Not Recognised 
Eurasian Eagle-owl Bubo bubo resident  1996-2000  10-15 breeding pairs  medium  B2  Least Concern 
Eurasian Pygmy-owl Glaucidium passerinum resident  1998-2002  100-150 breeding pairs  good  C6  Least Concern 
Boreal Owl Aegolius funereus resident  1998-2002  30-50 breeding pairs  good  C6  Least Concern 
European Nightjar Caprimulgus europaeus breeding  1998-2002  15-30 breeding pairs  good  C6  Least Concern 
Common Kingfisher Alcedo atthis resident  1996-2000  20-30 breeding pairs  medium  B2, C6  Least Concern 
Picus canus resident  1998-2002  40-60 breeding pairs  medium  B2, C6  Not Recognised 
Black Woodpecker Dryocopus martius resident  1998-2002  80-100 breeding pairs  medium  C6  Least Concern 
Middle Spotted Woodpecker Leiopicus medius resident  1996-2000  90-110 breeding pairs  medium  B3  Least Concern 
Picus viridis resident  1996-2000  80-150 breeding pairs  medium  B2  Not Recognised 
Sand Martin Riparia riparia breeding  1996-2000  500-1,000 breeding pairs  medium  B2  Least Concern 
Wood Lark Lullula arborea breeding  1998-2002  20-30 breeding pairs  medium  C6  Least Concern 
Bluethroat Luscinia svecica breeding  1998-2002  140-180 breeding pairs  medium  C6  Least Concern 

IBA Monitoring

2010 not assessed very unfavourable not assessed
Good - based on reliable and complete / representative data

Anser anser Greylag Goose 6780 3240 individuals 48 unfavourable
Mareca strepera Gadwall 840 229 individuals 28 very unfavourable
Spatula clypeata Northern Shoveler 698 1019 individuals 100 favourable
Ciconia nigra Black Stork 12 8 breeding pairs 67 unfavourable
Nycticorax nycticorax Black-crowned Night-heron 100 112 breeding pairs 100 favourable
Ardea alba Great White Egret 380 197 individuals 52 unfavourable
Pernis apivorus European Honey-buzzard 15 25 breeding pairs 100 favourable
Haliaeetus albicilla White-tailed Sea-eagle 13 13 breeding pairs 100 favourable
Circus aeruginosus Western Marsh-harrier 55 35 breeding pairs 64 unfavourable
Haliaeetus albicilla White-tailed Sea-eagle 45 70 individuals 100 favourable
Sterna hirundo Common Tern 60 55 breeding pairs 92 favourable
Caprimulgus europaeus European Nightjar 23 17 breeding pairs 74 near favourable
Alcedo atthis Common Kingfisher 25 17 breeding pairs 68 unfavourable
Dryocopus martius Black Woodpecker 90 70 breeding pairs 78 near favourable
Leiopicus medius Middle Spotted Woodpecker 100 100 breeding pairs 100 favourable
Lullula arborea Wood Lark 25 20 breeding pairs 80 near favourable
Luscinia svecica Bluethroat 160 160 breeding pairs 100 favourable

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Trebon Basin Protected Landscape Area UNESCO-MAB Biosphere Reserve 70,000 protected area contained by site 70,000  
Trebonská raseliniste (Trebon mires) Wetlands of International Importance (Ramsar) 1,100 protected area contained by site 1,100  
Trebonská rybníky (Trebon fishponds) Wetlands of International Importance (Ramsar) 10,165 protected area contained by site 10,165  
Trebonsko Protected Landscape Area 70,695 protected area contained by site 70,000  


IUCN habitat Habitat detail Extent (% of site)
Forest Alluvial and very wet forest; Broadleaved deciduous woodland; Mixed woodland; Native coniferous woodland  45%
Grassland Humid grasslands; Mesophile grasslands  5%
Wetlands (inland) Fens, transition mires and springs; Rivers and streams; Standing freshwater; Water fringe vegetation  24%
Artificial - terrestrial Arable land; Highly improved re-seeded landscapes; Other urban and industrial areas; Perennial crops, orchards and groves; Urban parks and gardens  37%

Land use

Land-use Extent (% of site)
agriculture 28%
fisheries/aquaculture 11%
forestry 43%
hunting -
nature conservation and research 20%
tourism/recreation 5%
urban/industrial/transport 14%
water management 1%

Protection status About 89% of this IBA is covered by the Tøeboòsko Protected landscape Area and Biosphere Reserve, almost 18% belongs to a Ramsar site and there are 27 small-scale protected areas. IBA covers SPA Trebonsko (47,360 ha)

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Trebonsko (Trebon region). Downloaded from on 23/10/2016

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