Koala Windows [FAST]

Reyes replied: "So we didn't build a crossing. We built a lesson."

It started in the early 2010s on the eastern slopes of the Great Dividing Range, where the Brisbane-Sydney rail line cuts through a remnant patch of eucalyptus forest. Koalas in this region—already stressed by habitat fragmentation and chlamydia—faced a new, silent predator: the 8:15 AM express train. Collisions were rising. A koala, when startled on the ground, doesn't run. It climbs. And the nearest vertical structure was often a steel rail signal post. koala windows

This is the story of how a problem became a solution, and how a solution changed the way a country thought about its roads. Reyes replied: "So we didn't build a crossing

Her report was clear: "Koalas perceive vertical structures as trees. To a koala, a steel post is a eucalyptus. The solution is not to stop koalas from climbing—it is to give them a tree worth climbing." Collisions were rising

Today, Koala Windows are standard infrastructure on new road and rail projects in Queensland and New South Wales. They have been adapted for squirrel gliders (smaller ledges), spotted-tailed quolls (wider platforms), and even tree frogs (grooves that hold water). The design was open-sourced by the Australian government in 2021. Versions now exist in Japan (for raccoon dogs), Brazil (for golden lion tamarins), and Canada (for martens).