Lele, I have nightmares about the birds plucking Fractal away. We have big menacing crows here. lol I was looking at a Fugi apple tree, only 4 ft tall. My instinct was to get it, but I decided to come here and see if there was a better choice. I know someone on here does this all the time. What kind of trees are they using? (without importing from chameleon homeland) <G> What kind of hibiscus are you others using?
So do you mean getting a tree for in his cage or letting him roam outside. Any hibiscus is great. If you live in the north you generally get the smaller potted ones (this is for inside cage), but hibiscus in general are safe (to eat) and as someone noted a veiled will eat the flowers. Luna used to eat the peach color flowers and not the darker orange! lol!!
As for outside trees the cham won't care as he just wants to roam - just be sure you can reach him easily at all times
I would love to take my chameleons out for a good shower in one of my potted trees, but I also have the bird fears. We have nesting owls, ospreys, and red-tailed hawks, not to mention the snakes that eat the wild anoles off of my pool deck!
Juli, I live in semi-rural NH so have hawks, owls, herons (on a river, but no osprey) and some snakes. First thing is that owls hunt at night

If you put your cham on the grass in a an area where there are snakes - well, that simply would not be too bright -
I have a 5-6' Viburnum that was Luna's shower tree. She would just sit there in the mist (she preferred that setting

). For showering Cyrus he loves the blueberry bushes and since they are less than 5' and I am standing right there, there is no chance a hawk or even a large crow would come near IF they'd even see him.
Yesterday when I had him in the apple I was a few feet away and again he is wandering in a mass of low branches not out and exposed. In fact, about 4' away from where he was climbing are orange slices I put out for the orioles - neither paid attention to the other.
On another forum there were a couple of those sad stories but they all had one thing in common - the keeper left, if only for a minute. It is less often an animal getting it as that they climbed of their "usual" tree and disappeared. The places I put Cy, he has no access to a larger tree - unless he jumped and with his bad eye and funky feet there is little chance -

There are times I'll bring him out and then realize I didn't bring my camera. As tempting as it is to "just run inside" I either do without or bring him with me.
So the long and the short of it is to choose your tree carefully, nothing that has poisonous/toxic fruit, use common sense and never, ever, ever take your eyes of him/her.
I just dug up a couple pics of Luna (gravid) in her Viburnum. The first day she was on it she ate a berry (safe, but tart) and she was not happy! Kept her away from eating red things for a while - then she had her first strawberry!