The two ruffed lemur species are the most rambunctious and arboreal. The two groups are rivals and tend to stay out of each other's way. The reds used to be more dominant, but as a group are older.
The ringtAils are usually in close proximity of each other. Usually on or near the group curling up together. They don't mingle much with the other species. The red fronted browns are fairly mellow, and tend to hangout together and sometimes with the blue eyed black lemur who recently lost his companion, a, common black lemur. The blue eyed black also spends a lot of time with the crowned lemurs since they arrived.
The red bellied lemurs are the smallest and most reclusive, usually they can be found hiding in the bamboo forest or tree crotch. The female is plump and doesn't move a lot. The male won't let other lemurs near her
The one on the rope is a red fronted brown. The one under he tree is a crowned, there's a ringtail not fully visible on the platform closest to the top, and then the two ruffed species in the left
Oops. you're right. I had trouble zoom in until now. I assumed it was the brown lemur since the red bellies rarely go high up on the climbing structures/ropes