Duisburg zoo - sloth by belgianchocolate
In the ape-building they made a construction with ropes so the sloths can move arround freely over the heads of the visitors.Sloths are slow-moving native to south and middle america mammals. When you want to see them move arround I would sujest that you proove your luck early in the morning.
They also have an enclosure in the middle , sort of a save haven for them.
Other rare inhabitant : go and see the fossas. They got new enclosures as well. They are the largest felines - predators who live on madagascar. Everything that lives on madagascar (except humans) are extremely endagered I'm affraid.