• Alluvial forest
  • Sterna hirundo - Common Tern
  • Aythya nyorca - Ferruginous Duck
  • Egretta alba - Great White Egrett
  • Ciconia nigra - Black Stork
  • Haliaeetus albicilla - White-tailed Sea Eagle
  • The alluvial wetlands of the lower flow of River Sava - Lonjsko Polje nature park

    Area description

    This is the largest retention basin in Croatia, a lowland area with large wet pastures, alluvial oak forests, riverine forests and scrubs, numerous temporary and permanent bodies of water - fishponds, ponds, oxbow lakes, pits, rivers (Sava and Lonja as largest, but also many smaller), canals (Strug, Trebez), etc. The most important part of this area is the Nature park Lonjsko Polje, the main Croatian breeding area of Night Heron, Black and White Stork and Corncrake.

    Forests of the area provide Croatian top breeding sites for White-tailed Eagle, Lesser Spotted Eagle, Middle Spotted Woodpecker and Collared Flycatcher. The main threats to birds are generated by drainage, river canalization, agricultural development, withering of traditional farming methods, possible loss of carp fishponds due to abandonment of fish production, intensive forest management and unregulated hunting, recreational activities and tourism.

    Types of habitats

    • 43% alluvial oak forests
    • 21% mosaic arable fields and rural landscape
    • 20% grassland, mainly wet meadows
    • 14% intensively cultivated arable fields
    • 2% wetland and swamps


    Black-necked Grebe, Cormorant, Night Heron, Little Egret, Great White Egret, Purple Heron, Black Stork, White Stork, Spoonbill, Ferruginous Duck, Honey Buzzard, Black Kite,  White-tailed Sea Eagle, Marsh Harrier, Montagu's Harrier, Lesser Spotted Eagle, Spotted Eagle, Spotted Crake, Little Crake, Corncrake, Snipe,  Whiskered Tern, Middle Spotted Woodpecker, Collared Flycatcher, Pygmy Cormorant, Little Bittern, Bittern, Hen Harrier, Common Crane, Ruff, Wood Sandpiper, Little Gull, Black Tern, Common Tern, Ural Owl, Short-Eared Owl, Kingfisher, Gray-headed Woodpecker, Black Woodpecker, Syrian Woodpecker, Moustached Warbler, Barred Warbler, Red-backed Shrike, Lesser Grey Shrike.