Craig’s research centers on the use of molecular approaches to study ecology and evolution and addresses questions including;
(1) the use of molecular markers to infer current and historical population processes at various spatial and temporal scales;
(2) the effects of historical changes in habitat on current distributions and diversity of faunas, with particular reference to rainforest biotas;
(3) improving the use of molecular information in conservation biology and the development of strategies that recognize evolutionary processes.
The geographic focus of this research program spans the tropical forests of Australasia, especially the wet tropics of northeastern Australia and western North America