Overview
- Authorities and conservation groups say autonomous lawn mowers pose a lethal risk to night-active small animals because the machines can run silently through gardens when hedgehogs are active.
- A 2023 study by the University of Aalborg tested 18 models and found none detected hedgehogs lying in grass, with several machines running over the animals and causing severe injuries.
- The municipality of Bad Heilbrunn has asked residents not to operate mowers at night and is reviewing how its own devices on football pitches are programmed so they do not run after dark.
- Groups such as Bund Naturschutz and NABU want stricter limits or a full stop to consumer robot mowers, while makers continue to market 'hedgehog-safe' features that studies and authorities say have technical limits.
- Experts recommend practical steps for homeowners: run mowers only by day, cut less often, create wild corners for shelter, and expect more local rules or programming changes from communities in the near term.