first one I’ll share is being at a Petland store in Kamloops, BC. it wasn’t very busy and we started hearing a metal plink sound and then metal tinkle sounds. we started looking around and then someone shouted it was the Cockatoo. they were put in an insufficient cage and it was actually biting the metal bars and the tinkle sound we were hearing was the bars falling to the ground when they had bitten the same one again.
so remember to put your birds in bird appropriate cages!