15. Ecoduct, Colorado, USA

Forming part of the Southern Rocky Mountain region, Colorado is a vital habitat linkage point for various species. You can see deer crossing over the “ecoduct” in the picture.
16. Squirrel Bridge, Washington, USA

Nutty Narrows bridge is actually the narrowest bridge in the world. It was conceived by a man named Amos Peters, who decided to do something about the constant stream of squirrels meeting an unfortunate fate as they made their way across the road. The bridge can also be found in various US heritage registers and lists.
17. Animal Bridge, Montana, USA

This bridge stands over the Interstate 93 near Evaro, Montana. It’s located on an Indian reservation, an area inhabited by Native Americans for more than 14,000 years.
18. Cattle Underpass, Victoria, Australia

Farmers in the Australian state of Victoria can actually apply to the local government for grants to fund the construction of these underpasses. The initiative was undertaken to avert dangerous situations involving big herds of cows having to be herded over busy roads.
19. Bee Highway, Oslo, Norway

