Fen Grasshopper Acoustic Monitoring

Acoustic monitoring using bat detectors and automated recording units has revolutionised survey efficiency for the highly cryptic fen grasshopper and other rare acoustic insects.

Key Facts

The fen grasshopper produces a distinctive calling song that can be recorded using heterodyne bat detectors
Automated acoustic recording units deployed at sites can detect presence without requiring trained human observers
Song analysis software allows identification of species from recordings made in the field
Acoustic monitoring extends survey capacity beyond traditional visual transect methods in dense vegetation
Regular acoustic monitoring provides population trend data essential for conservation management decisions
Volunteer acoustic monitoring networks have significantly expanded coverage of rare Orthoptera recording in the UK

Welfare Considerations

Improved acoustic monitoring of fen grasshoppers enables more effective conservation management by providing better data on population size, distribution, and trend. Conservation interventions including water level management and vegetation control can be evaluated for effectiveness through pre and post-management acoustic surveys. Better data enables targeted intervention at the most threatened sites, preventing the population decline and individual welfare costs of deteriorating habitat conditions. Acoustic monitoring is a non-invasive welfare-neutral survey technique that provides high-quality conservation information without disturbing the animals being surveyed.

What You Can Do

Support the Orthoptera Recording Scheme with fen grasshopper sighting and acoustic data submissions
Volunteer for fen grasshopper acoustic surveys at known sites in East Anglia during the survey season
Donate to conservation organisations using acoustic monitoring to guide fen habitat management
Advocate for acoustic monitoring resources to be funded through conservation management budgets
Engage with citizen science recording schemes that use acoustic data from smartphones and bat detectors