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U.K Researchers, In A World First, Proved That European Hedgehogs Can Detect High-Frequency Sounds Up To At Least 85 KHz. This Is Thanks To Their Stiffened Middle-Ear Bones, Similar To Echolocating Bats. This May Explain Why Hedgehogs Don’t Hear Some Car Noises, Which Leads To Road Deaths. Future Ultrasound Repellers Could Help Save Them.

European hedgehogs are often hit by cars. Researchers say ultrasound could save them from extinction | Euronews

https://www.euronews.com/2026/03/11/european-hedgehogs-are-often-hit-by-cars-researchers-say-ultrasound-could-save-them-from-e

Road traffic accidents are thought to kill up to a third of hedgehogs in local populations.