Identified by call (took more shots a minute later showing the beak).
Bibbulmun Track. Red-tailed Black Cockatoos and Red Wattlebirds were drinking from a hollow, which was filled with water. It isn't a nest.
Bibbulmun Track
Bird with a black striped front and a blue shimmer to the back. seen on the edge of Karri Forrest and Jarrah Marri Forest in south west capes region of WA
On the Bibbulmun Track between the Mundaring Weir Hotel and Ball Creek shelter, near the Mundaring Weir Hotel
Counted 15 individuals spread over a few neighbouring trees.