We present the results of our 13th annual horizon scan of issues likely to impact biodiversity conservation. Issues are either novel within the biological conservation sector or could cause a substantial step-change in impact, either globally or regionally. Our global panel of 26 scientists and practitioners identified 15 issues that we believe represent the highest priorities for tracking and action. Many of the issues we identified, including the impact of satellite megaconstellations, and the use of long-distance wireless energy transfer, have elements of threats and emerging opportunities. The recent state-sponsored application to commence deep-sea mining represents a significant step-change in impact. We hope that this horizon scan will increase research and policy attention on the highlighted issues.