Wildlife crossing, Netherlands

Wild creatures risk their lives every time they need to traverse the thousands of highways humans have constructed through wildlife habitat and, sadly, millions of animals are killed on roads each year. Thankfully, many countries now construct wildlife crossings – also called green bridges, ecoducts, natuurbrug (like this one in Wierden in the Netherlands) and écoponts (in France). These can be overpasses or underpasses, and they are an expensive venture.
© Frans Lemmens/Alamy