I am interested in the origins of biodiversity: how did the earth get so many species, and how did they get to be so different from one another? My research focuses on comparing the evolutionary history of complex traits, their functions, and their underlying mechanisms. I use two systems to study the evolution of complex signal traits: a modeI clade of Australian birds, and a network of acoustic monitoring stations in the southern islands of Japan. I want to understand how signal traits are influenced by natural and sexual selection in different ways across geographic gradients, and how this contributes to macroevolutionary and macroecological processes. In the Biodiversity and Biocomplexity Unit at OIST, I also use these phylogenetic comparative approaches to explore morphological evolution in ants.