Nice! I've never seen them anywhere besides way in the top of their enclosure, right above the viewing panel where they're impossible to photograph. I'm very jealous!
I guess they are becoming more confident, when I enter on the park they were also on the top, I had to go back to the enclosure about five times and finally I saw three of them playing on the ground just in front of the glass. Was the highlight of the day, hehe. Later on I also saw them on the feeder and on the ropes in the middle of the enclosure, so I´m sure you´ll get a great picture of them very soon!
I had that bad luck with the Greater Birds-of-Paradise, all were on the top of the enclosures. Although the area is so dark that I don´t think I could had got any decent picture anyway XD