Motion displays are a feature of social signalling by many of Australia’s dragon lizards (Family: Agamidae). They are used in a variety of situations but are particularly useful for territory defense as assessment is possible from a distance and potentially harmful physical confrontations can be avoided. Nevertheless, scientific consideration of the signalling behaviour of Australian agamid lizards has been surprisingly overlooked. This project considers movement-based signalling in an ecological framework by comparing the signalling behaviour of sympatric and allopatric species, as well as comparing the signalling behaviour of single species across different populations in a range of habitats.