I keep mine most of the year outside, from min. 5°C to max 32°, and they are in great health. The cage must have a lot of plants, and high humidity.
Here some pics
https://www.chameleonforums.com/anyone-here-buy-ch-16894/
and a care sheet in german
http://www.ig-chamaeleons.de/
regards
Hey Niels,
I have some pics of C. Tr. Incornutus, I will send you.
I think you can find some pics on the Necas book.
It's possibile the right name is "Balebicornutus"?