The Tropical Rainforest Roamers. These are animals that don't always stay in one of the five layers. They frequently move between the layers for food and shelter. Often these animals don't have any one place that they return to, they have many or none at all.
Tamarins use whistles and trills as communication.
Scent signals also used for marking territories. Males play a major role in raising young and can be found carrying one of the pairs of twins around almost as often as not. Sloths are slow moving and spend most of their lives in the trees hanging upside down. Their fur grows from their belly to their back, which is the opposite of most mammals. They are not primates, rather they belong to the group that includes aardvarks and armadillos.