Biodiversity Net Gain (BNG) is development that leaves biodiversity in a measurable better state than beforehand. The Natural England Biodiversity Metric 2.0 is a habitat-based metric to measure BNG, and good practice is to use the metric in combination with ecological information to design BNG based on biodiversity, and not a single number. But what does that combination of ecological+metric decision-making look like, especially for wildlife such as bats?

This webinar presents a new technical note on designing Biodiversity Net Gain (BNG) for bats, produced by the Bat Conservation Trust. We describe a process for using Core Sustenance Zones and Habitats of Principal Importance to design net gain outcomes for bats, especially to generate long-term outcomes in terms of roost viability and resilience.