Almost 5,000 pine trees are gone from Adelaide's north-eastern suburbs, cut down in the fight against giant pine scale. Residents in Highbury and Hope Valley say the hills look bare. Authorities say leaving infected pines standing is not an option.

A public shelter on the Hope Valley Reservoir dam wall in Adelaide's north east, an illustrative landscape near giant pine scale response sites, not a claim every tree in frame was infected. Photo: RegionVisitor90 / Wikimedia Commons, CC0, modified.