Individual study: Tunnels and temperature: results from a study of a drift fence and tunnel system for amphibians at Henley-on-Thames, Buckinghamshire, England
Langton T.E.S. (1989) Tunnels and temperature: results from a study of a drift fence and tunnel system for amphibians at Henley-on-Thames, Buckinghamshire, England. Amphibians and Roads: Proceedings of the Toad Tunnel Conference, Rendsburg, Federal Republic of Germany, 145-152.
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Install culverts or tunnels as road crossings
A small, replicated study in 1987 of two tunnels with barrier fencing in Henley-on-Thames, England, UK (Langton 1989) found that approximately 2,750 common toads Bufo bufo used the tunnels during 18 migration nights. In the first two nights, only about 10% of 2,200 toads recorded behind the fence were estimated to have used the tunnels. This increased to a maximum of 43% of toads recorded in one night. Fencing was installed between the two tunnels creating a W-shaped catchment of 600 m. A trip counter was set 0.2 m into the entrance of the tunnels.