BBC News Walker Swamp: The mission to restore an Australian wetland Close In the shadow of Australia's Grampians National Park lies Walker Swamp, a once-thriving wetland that was artificially drained and farmed for over a century. But it is now welcoming new life once more, after a huge restoration project. Its revival is one "message of hope" amid so much grim environmental news, ecologists tell the BBC. Video by Isabelle Rodd This video has been optimised for mobile viewing on the BBC News app. The BBC News app is available from the Apple App Store for Android.