The actions of animals, birds, insects and undersea creatures give good examples of the uses of rhythm and movement of the body for expression. The courtship displays of many bird species consist of movements of the head, wings and other body parts. Cranes and herons perform elaborate movements, and often the female response closely resembles the males so that they appear to be dancing together. This example can easily be adapted to create workshops for the members of your drama group working in pairs. The Birds of Paradise gather in trees and on the ground to display themselves by strutting and danceing, and spreading their plumes.
Female fireflies flash their light in certain rhythmic patterns.
Male lizards bob their heads rhythmatically when a female approached. All of the above can stimulate ideas for creating good movement workshops for pairs or small groups within your group, and can be expanded and developed artistically by including masks, costume such as feathers etc. Even for the workshops you need to create for and with your whole group, you can look to nature. When scouts return to the hive, they use a special dance to indicate distance and location for the site of a new hive, and the use another dance to tell where food is in relation to the Sun. The faster the bee dances, the further away it is.