Researchers used AI to analyse 98 million bat calls recorded across 310 British woodlands over three years, making the country’s largest woodland bat survey possible at a scale that would otherwise have taken more than 30 years to process. The survey recorded some of England’s rarest bats, including the red-listed Barbastelle, with hotspots in the South West.
Watch Desk analysis
What happened
The recordings came from 90,000 hours of field data collected using devices placed among the trees. Researchers used open-source AI tools to identify bat calls, find patterns and flag species across thousands of nights of recordings, the BBC reports.
Kate Jones of University College London said analysing that volume of acoustic data manually would not have been feasible. The Bat Conservation Trust and Forest Research were also involved in the survey.
Why it matters
Monitoring wildlife at this scale can help researchers understand where threatened species are active, including places where elusive bats have been difficult to track. The survey found Barbastelle activity hotspots in the South West, including Somerset, Devon, Cornwall and Dorset.
This is a concrete use for AI: taking on a large, repetitive analysis task so researchers can work with data that would otherwise be impractical to process. It does not, by itself, tell us whether conservation efforts are improving bat numbers.
Our read
The useful story here is not that AI has replaced fieldwork. It is that researchers could turn years of recordings into a national-scale picture of bat activity, with findings that can guide further study. For once, the machine has been handed 98 million calls and asked to pick out the bats. A reasonable use of everyone’s time.
What to watch
- Whether researchers publish the survey data or further detail on how the AI tools identified calls.
- Whether the South West hotspots lead to targeted conservation work.
- Whether future surveys show changes in bat activity over time.
Discussion spark: Should wildlife-monitoring projects prioritise making AI-analysed data open to researchers, or focus first on turning findings like these into local conservation action?
Sources and evidence
- AI makes Britain's largest woodland bat survey possible, scientists say – BBC (30 October 2026, 06:10 UTC)
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