Learn with Manuel Lara about some of the species that use “wildlife crossing”, designed structures that allow animals to cross barriers made by humans.
Roads are ubiquitous components of many landscapes throughout the world. These human structures and their traffic cause wildlife mortality and disrupt animal movements, creating a barrier effect, habitat fragmentation and increasing the risk of extinction. Wildlife crossings are structures designed to allow animals to cross human-made barriers safely.
There are different types of structures, that can be classified as: crossing over the traffic, such as overpasses or green bridges (mainly for large or herd-type animals), arboreal crossings or rope bridges (especially for monkeys and squirrels), and green roofs (for butterflies and birds); crossing under the traffic, such as viaducts, underpass tunnels (for small mammals), culverts and tunnels for amphibians; and other special types such as fish ladders.
“Wildlife crossings are structures designed to allow animals to cross human-made barriers.”