Project 6.1 Saving threatened species from extinction costs money. Costs play a big part in decision-making around conservation actions, yet using economic theory in developing decision frameworks for conservation has not been done before. This project addresses this shortfall, through collating existing relevant knowledge and creating a series of tools for using economics to inform threatened species conservation. We will achieve this by looking at costs, derived benefits, and trade-offs involved in undertaking conservation work on single species, and by using the tools we develop to support practical decision-making in existing conservation strategies.