From 25 to 31 March, 1989, the Mammal Section of the Royal Zoological Society of NSW conducted a fauna survey of part of the Mac- quarie Marshes Nature Reserve. The primary purpose of our survey was to add to the knowledge of the mammalian fauna of the Marshes since the avifauna and herpetofauna have been well surveyed (Brooker and Wombey 1986; Cooper 1954). This note presents a summary of bat captures and inci- dental observations of other vertebrates made during the recent Mammal Section survey. Macquarie Marshes Nature Reserve is situated approximately 100 km north of Warren in central western New South Wales (Fig. 1). The reserve is covered by large areas of wetland vegetation, and significant areas of eucalypt woodland dominated by River Red Gum Euculyptus cam1duleusi.s. There are also extensive areas of dead standing and fallen timber in former woodland apparently killed by changes in water regime associated with the construction of irrigation works. A more detailed descri~tion can be found in Paiimans (1981) and