Management of broadly distributed invasive species requires knowledge of population densities across multiple ecosystems. The feral cat has a continental distribution in Australia; however, density estimates from several ecosystems are few or lacking. This study aimed to estimate the feral cat population density within a subtropical rainforest ecosystem. We demonstrated that the feral cat density was unexpectedly high. Our study adds to a growing body of literature that suggests feral cat densities are high in productive mesic reserves of eastern Australia. Image by Darren McHugh.

Acoustic monitoring with autonomous recording units (ARUs) offers efficient ecosystem assessment, but producing high quality data is challenging. We assessed detection probabilities of five frog species from ten ARUs positioned across a wetland, finding that the degree of spatiotemporal variability in detection varied by species. Our analysis informed ARU deployment requirements for producing reliable species community monitoring data and informed confidence levels when fewer ARUs are deployed. Image by Andrew Hall.