Cockatoos and Corellas nesting in non trees.

Years ago I saw Corellas nesting in the Limestone Cliffs along the lower Murray River, when boating on the river, I think it was near Mannum S.A. On a trip across the Nullarbor in 2011 Galahs were nesting in the cliffs along the Coast at the start of the Great Australian Bight, there were no large trees in this area. Cock birds were calling the hens out of the holes to feed them in the mornings. Many more were eating the soil from the cliffs and they were the deepest pink I have ever seen on Galahs possibly due to the minerals they were getting from the soil. ( Photos taken ) On the Gold Coast there is a small flock of Long-billed Corellas and many large flocks of Little Corellas. Where the Nerang-Broadbeach Rd crosses the Pacific Hw at Nerang a pair of Littles Corellas tried to nest in the traffic lights, they were seen chewing the paint around the cover each morning when I went to work and after about a week one could be seen sitting sideways in the light all day, lasted about five days. Don’t know if they were hunted away or she laid an egg and it fell down onto the road. They have been hanging around there again this year. Too many Corellas and Sulphur-crested Cockatoos and not enough old trees with hollows in them. Barney.