On a bright sunny morning in October 2020, Blasdell was wandering the suburban streets of the Mornington Peninsular adorned with a facemask, blue gloves and a yellow plastic bag. She stopped next to a tree with soft, papery bark that flaps in the wind, and craned her head back to stare into the canopy. The moonah tree (Melaleuca preissiana) is a favourite possum hangout, and – bingo – she spotted a nest. In the grass below, she quickly found what she was looking for: dark brown pellets of possum poo.