There were a pair of Gang-gangs in a group of trees that straddle the current golf course fence. Both birds were chewing at wood in various trees. They seemed interested in what may have been a hollow high up in a tree just outside of the golf course fence but neither went inside, so I am not sure how deep it was. The female was perched quietly in the tree while the male would call occasionally. At one stage, it appeared that the male chased the female from the hollow. He flew at her, calling out, causing her to quickly fly from that part of the tree to a nearby branch. The male did not pursue her. Later they both flew off to the west, after I had left the area of the tree. They may have returned a little while later as I heard some calling from where I had first seen them.