The project focused on a road claimed to have one of the worst roadkill rates in the world. Long Point Causeway, a road beside Lake Erie in Ontario, runs through a nature reserve - a Unesco "biosphere reserve" - which is home to a number of endangered species of turtles. But this mix of slow animals and fast traffic has meant a terrible rate of attrition. On a stretch of road less than three miles long, 10,000 animals, from 100 different species were being crushed each year, including many rare turtles. Turtles are relatively slow to reproduce - some species can be 20 years old before they lay their first eggs. It means that generations are replaced only slowly and the survival of turtle...
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