This was the first scientific expedition under the second phase of the Mount Mabu Conservation Project (MMCP) initiative funded through the Biofund and Rainforest Trust grants to help provide further evidence base towards creating a new protected area for Mount Mabu. This expedition, 10th to 22nd September 2022, focused on studying certain taxonomic groups such as small mammals, freshwater fish, bush-crickets. The expedition returned to the easterly forest camp as used by previous expeditions and surveyed this part of the forest. The small mammals, freshwater fauna, and bush crickets represent gaps in the zoological survey which needed to be surveyed to complete the record for the eastern part of Mabu forest, thus building on the previous work of biodiversity survey. New species records for Mabu forest and species new to science were discovered as a result of this expedition, adding to database of biological discovery from previous expeditions and further raising the importance of Mabu forest. Notably the small mammal list was added to and revised accordingly. As a result of this expedition an additional five species of bat were added to the known bat species list for Mabu. Further to this, two additional species of rodent were also added to the list and the identification of the shrews (Crocidura sp.) were further analysed as they represent a complex of species. There were no new species discovered amongst the freshwater fauna (fish or crabs) however for the first time the freshwater fish were identified and represent five species which we can add to the overall species list. For the first time the Katydids (bush crickets) were collected and species new to science are expected in this group.

Key words: Mabu forest; small mammals; freshwater fish; bush-crickets