Most biodiversity loss is caused by human behaviour, so changing harmful behaviours is critical for protecting biodiversity. In Australia, getting individuals to change to behaviours that can directly benefit threatened species is thwarted by a poor understanding within the research, governance and general communities of what individuals can do that will make a difference. This project will identify the human behaviours that can have the most positive impact on Australia’s threatened species. It will then prioritise them for behaviour change through targeted messaging and conservation marketing campaigns.