Koala Windows Now

The first "Koala Window" was not a window at all. It was a 6-meter-high panel of recycled polymer, molded to mimic ironbark bark, with hidden ledges and woven vines of durable coir fiber. It was attached to the side of an existing overpass. It cost $4,000 AUD—less than one rail signal post replacement.

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). koala windows

Then came the twist. In 2018, a bushfire tore through the same forest. The main koala habitat was reduced to ash. But the Koala Windows—their polymer surfaces scorched but intact—stood. And weeks later, motion cameras showed surviving koalas using the windows not just to cross the tracks, but to reach a small unburned gully on the other side. The artificial trees had become a lifeline. The first "Koala Window" was not a window at all