Well chameleons do drink standing water and chameleons do go to the forest floor and walk on the ground. How do I know? I’ve heard about chameleons drinking standing water several times from different guides when I was on one of my trips to Madagascar and I’ve seen chameleons walking on the ground, even crossing roads. That doesn’t mean that you should only put a glass of water in a chameleon cage and expect them to drink from it though. some may but most may not. I’ve never tried it.
There’s a reptile park in Madagascar and they have a huge chameleon enclosure with a bunch of chameleons in it. They supply water using bamboo troughs.
Here’s a picture I recently came across of a chameleon drinking standing water in Madagascar.
This is not my picture.
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