The Warrego River is a significant dryland river system flowing through Queensland and into New South Wales, forming part of the greater Murray-Darling Basin. Rising in the ranges of central Queensland, the river winds its way southward through semi-arid and arid landscapes before eventually connecting with the Darling River system. As a classic dryland river, the Warrego is characterized by highly variable flows — periods of flood interspersed with extended dry spells — which profoundly shape its fish communities, habitat structure, and overall ecology. The river's waters are typically turbid and brown, reflecting the fine sediment loads common to rivers draining these flat, ancient landscapes. The Warrego catchment is part of the broader Paroo-Warrego subcatchment within the Murray-Darling Basin, a region of immense ecological importance for native freshwater fish.