Hey, I recently constructed a decent sized cage for my iguana. As far as tree branches I originally planned to put an acutal branch in the cage but after coming up short as to the shape I wanted and then when I found what I needed and realized how heavy it was I opted to go with a custom pvc setup. I just painted it black and wrapped the straight areas with astro turf. The iguanas love it, and its easy to clean. Here are some pictures of the cage.

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