The nature reserve comprises a reedbed, salty steppe grasslands, meadows and woodlands, forming a mosaic of ecosystems that supports a particular biodiversity. The compact reedbed covering the Sic and Coasta valleys is the largest reedbed in Romania, besides the Danube Delta,
and represents the best habitat for many species of birds, both for nesting and during migration, such as Great egret (Egretta alba), Little egret (Egretta garzetta) Spotted Crake (Porzana porzana) Little crake (Porzana parva), Marsh Harrier (Circus aeruginosus ), Hen Harrier (Circus cyaneus), white stork (Ciconia ciconia), Little bittern (Ixobrychus minutus), Bittern (Botaurus stellaris), Whiskered tern (Chlidonias hybridus), Tawny pipit (Anthus campestris), Woodlark (Lullula arborea), Red-backed shrike (Lanius collurio), Lesser grey shrike (Lanius minor), but also woodpeckers, warblers or Ural owl (Strix uralensis). Here can also be found stag beetle (Lucanus cervus) and Bolbelasmus unicornis, the Yellow-bellied toad (Bombina variegata) and the crested newt (Triturus cristatus).
The Sic Reedbeds has been a nature protected area since 1974, but then it has an area of only 2 hectares. By Law No. 5/2000 it has become a nature reserve of national interest, and in 2002 by a decision of Sic Local Council, the entire reedbed, along with Păstăraia Valley, gained the status of natural reserve of local interest. By H. G. 2151/2004, the nature reserve area was extended to 505 ha.
Sic Reedbed nature reserve lies in the north-eastern of Cluj County, about 60 km from Cluj-Napoca, south-east from Sic, and can be reached by County Road 109D.