Thanks. I have made my perches out of Rowan wood, I believe the tree is called a mountain ash in the US. I also believe that the berries are safe to feed to tiels, is this correct?This is incredibly helpful, I am new to keeping cockatiel's and live in New Zealand. I am wondering if wattle trees are OK? does anyone know? Also can a put eucalyptus branches including leaves in my cage for my bird to have some fun?