I saw a pair of Crimson Rosellas who appeared very interested in a hollow of a dead pine tree. One looked like it was getting the top part of its body inside but I could not tell how wide the hollow was on the inside. It was possible they were looking at it as a nest but one of the birds looked to still be immature so it may be they were after food. Once the birds left I took a picture of the hollow from a different angle but the shadow still made it hard to determine the depth of the hollow into the tree. It did not appear as if the birds were using the hollow as a nest. A number of Common Starlings were also around the tree.