I wanted to see whether our bird is just particularly naughty or whether this is normal for cockatiels. Our previous one was blind so never had a destructive streak.
In 2 years he has chewed through telephone, stereo, headphone and Sky wires and has stripped the plastic off about two feet of thick cabling revealing the bare wires inside. He has gnawed all the edging off the mantelpiece and destroyed an antique clock. He has worked out how to lift photographs from frames to chew down them and we have recently discovered him pulling the threads of wool from the carpet!
It's not as if he doesn't have lots of attention, he spents 80% of his time on our heads and shoulders and is free to roam the house. Despite all the destruction, we do love his spirit though!!