Zygopetalum maxillare in habitat

It's great when you are walking in the forest and all of a sudden: boom, you are startled by those gorgeous big orchids staring at you. This Zygopetalum maxillare was photographed in the Atlantic Rainforest. It always flowers around March or April here. Apparently in the wild this orchid grows only on giant tree fern (Dicksonia sellowiana). On the photo below there's a "regular" tree on the foreground and a tree fern right at the back, the orchid was growing on that fern. I have never found it growing on other substrate. This is one of my favorite orchids.

 

Even though I have no photos of the roots, I remember you can see some roots, but generally very few, I guess most of the roots are inside the fern or covered by moss/ferns etc. The place where I found this one was near a natural forest border, so there was more light coming through than in comparison with the interior of the forest, but not a big difference. The light was still filtered by trees above. But they are not of the deep forest interior, as I have never seen it growing on tree ferns well inside the forest.