This one is a good one to read and believe…
https://chameleonacademy.com/chameleons-and-their-colors/
I have no scientific proof for you that they can control their colour changes. I can tell you of one very peculiar colour change one of my chameleons did many years ago that makes me wonder...
This isn’t really an answer…take them for what they are worth…there are bits and pieces that might be of interest to you in each of these…
Another one…there are quite a few mistakes in this one..horns on a veiled, etc..
One more…
IMHO…at least some species can to some degree sense when another chameleon is nearby as well…this has not been proven by studies as far as I know though.
You said…”I've read somewhere that some certain colors can make chameleons stressed or something like that. I have this old American flag and other stuff hanging up on the wall near his cage and I'm wondering if this could cause stress or something?”…IMHO, it’s not the colours of things around...
You and @MissSkittles said this…
“Handling -I handle her maybe 1-2 times per week. I used to use her for outreach events but have since stopped. The latter sounds like it would have been stressful, so glad that has stopped.”…my first thought when I saw this was that the outreach events would be...
Heard this one?
English translation…
All of us
All of us
Let us look at our way of life
Our children
Our grandfathers
All of us
All of us
Let us look at our way of life
Our rivers
Our lands
This is our reason
This one…
I also know that the zoo will “target train” a reptile like a Komodo dragon to follow a laser to the meal so they don’t have to be in the cage with the Komodo dragon…but I have no idea if a chameleon would ever figure that out.
https://taronga.org.au/news/2018-07-11/lasers-lead-way-komodo-dragon
I do think at least some chameleons recognize people to some extent. There was a graceful chameleon I wanted to buy in a store once many years ago. The store staff would not let me handle it saying it was very aggressive. It was not reacting that way to me IMHO…but when the store manager...
One issue I can see with experimenting with diet is that you might cause the chameleon some health issues such as MBD if the diet isn’t balanced….and it will just be suddenly obvious not show up slowly enough to correct before it does damage. You need someone with more knowledge of nutritional...