That corner looks like my current bathroom that Rainbow redesigned. I stripped out the corner and put in non treated wood pieces. I thought I had it made. It turned out that he thought my cabinet door was easier to chew. My cabinet does not have real wood. It is some kind of pressed material covered with a plastic laminent. This has gotten him banned from the bathroom and he tried to fool me when I made him leave by walking backward. Myrtle has pulled the plastic off my kitchen cabinets. All of them. When Rainbow started on the bathroom I thought "let him go" I have to come up with an idea to fix them anyway. Rainbow took a different direction and chewed the corner off. (In NC he made a hole behind the toilet that by the time I found it was 6 inches by 9 inches. It started by peeling wall paper while hiding behind the toilet waiting so she could jump out and scare Aunt Betty)
Being in Florida produced another idea. The part of the palm frawn left on the tree gets hard but are striated. (funny I could spell striated but not frawn.) They love them. Of course anything they like will become a problem. I find piles of shredded frawns every where. It hold their consentration and they stay there until it is gone. Then the dogs and cats run through playing and scatter it everywhere. At least I don't have carpet.
Rainbow and Myrtle are Amazons who make as big a mess as Toos.
There is a Too on YouTube that looks really brilliant. I have noticed since his house is spotless that he is an only child who gets non stop attention and enrichment. His wings are clipped but he has his own toy room and a toy place in each room. She must play with him all day. One of the things that got me was his yelling into a plastic cup to make his voice different. Of course he throws tantrums like a 2 year old. I love watching him and feel bad that I do not spend that much quality time with my babies.
There would be no depression if I could spend my day on the floor with my babies. For now I just have to spend 15 minutes or more on the floor in the Cockatiel room when I feel bad.