I glimpsed a black tail, but otherwise I could only see reflections of the sky and the trees. This is an example of a problem shown by many of the newer enclosures at the zoo.
Looks like a pretty pointless window then, especially as it's behind a barrier meaning you can't get close to block out the reflection. You'd think zoos would learn.
I suppose it still serves to let some natural light into the indoor area for the lemurs.