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Providing evidence to improve practice

Action: Divert bats to safe crossing points with plantings or fencing Bat Conservation

Key messages

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  • One study evaluated the effects of diverting bats using an artificial hedgerow on bat populations. The study was in Switzerland.




Supporting evidence from individual studies


A controlled, before-and-after study in 2003 of a bat roost in an agricultural area of Giswil, Switzerland (Britschgi et al. 2004) found that more lesser horseshoe bats Rhinolophus hipposideros exiting from the roost from one side flew in a particular direction after an artificial hedgerow was installed. The number of bats flying in a particular direction increased after an artificial hedgerow had been installed for over two weeks (before: average 3% of bats; after: 10% of bats). Bats flying along the artificial hedgerow were found to emerge earlier from the roost and return later than bats using other flight routes and were out of the roost for longer (up to 4 minutes more). The artificial hedgerow (1 m wide x 1.5–2 m high x 200 m long) consisted of native hedgerow plants in containers. It was placed through open farmland to connect the bat roost with a foraging habitat within forest. The experiment was split into phases of 4–5 nights, with one phase each for before and after control periods, and 6 experimental phases with the artificial hedgerow in place. Bat activity was monitored with bat detectors and infrared video cameras for >50 minutes at sunset and sunrise for 39 nights in July–September 2003.

Referenced papers

Please cite as:

Berthinussen, A., Richardson O.C. and Altringham J.D. (2019) Bat Conservation. Pages 67-140 in: W.J. Sutherland, L.V. Dicks, N. Ockendon, S.O. Petrovan & R.K. Smith (eds) What Works in Conservation 2019. Open Book Publishers, Cambridge, UK.