Free walking tours are conducted by volunteers twice a day at the Royal Botanic Garden in Sydney. They start at the Information booth just outside the shop, more or less in the middle of the Garden, and last between one and a half and two hours. Notable bird sightings are posted on the whiteboard at the booth. On the day of my visit, the presence of a Powerful Owl (Ninox strenua) at the RBG was indicated, and in the course of the tour we visited the tree in which the bird roosted.
That’s a rather interesting expression on the face of the Brahminy Kite (Haliastur indus) above.