But what happens when construction spreads over, under, across, and through animal habitats? Thankfully, groups of concerned citizens, scientists, engineers, and construction crews have come together to create wildlife crossings to help keep animals safe. From elk traversing a wildlife bridge across a Canadian interstate to titi monkeys using rope bridges over a Costa Rican road to salamanders creeping through tiny tunnels beneath a Massachusetts street, young readers are certain to be delighted and inspired by these ingenious solutions that are saving the lives of countless wild animals.