Fat-tailed dunnarts (

Grasslands are among the most endangered ecosystems, with <1% of Victorian grasslands remaining. Extinctions many grassland fauna species have occurred since European settlement due to loss suitable habitat, and dramatic range reductions continue for those that still exist. Fat-tailed dunnarts (Sminthopsis crassicaudata) only small ground-dwelling marsupial known persist in habitats. The last long-term targeted surveys this were conducted Victoria 1970s. Incidental findings from more recent short-term non-targeted same area suggest a decline. We performed direct fat-tailed at 1970s survey site over 12-month period 2019 found no evidence dunnart presence. is classified as Near Threatened state Least Concern internationally. Our work highlights importance assess stability across Victoria, need collection data better identify population declines.