The diana monkeys are now off exhibit. This exhibit (after some alteration) now holds sifaka lemurs, so they are most likely what you saw. The ruffed lemurs remain outdoors. The artificial tree in the back, right corner is heated. If I am not mistaken, they remain outside unless circumstances are extreme. The lemurs are Coquerel's Sifakas (Propithecus coquereli).
In years prior to the acquisition of the sifakas the Black-and-White Ruffed Lemurs would occupy this exhibit during the winter months Moebelle's post was made before the sifakas went on display at the zoo.
The diana monkeys are now off exhibit. This exhibit (after some alteration) now holds sifaka lemurs, so they are most likely what you saw. The ruffed lemurs remain outdoors. The artificial tree in the back, right corner is heated. If I am not mistaken, they remain outside unless circumstances are extreme. The lemurs are Coquerel's Sifakas (Propithecus coquereli).
My comment was before the sifakas were announced that they were on exhibit, and before then I haven't visited the zoo since the summer. During the festival of lights for the past few years, this exhibit held the ruffed lemurs. So no I had not mistaken ruffed lemurs for vertical jumping lemurs. I was also the first one on this website to announce, and see them. (sorry f you find this rude).
Yeah what Kudu said, his comment is more understandable I also wanted to point out that this exhibit has much more foliage, bamboo(I think), and more fake vines.