Macroevolutionary dynamics
How can we more accurately estimate speciation rates through time? What drives discord between molecular phylogenetic and palaeontological rate estimates?
What factors impact rates of morphological evolution?
What aspects of life history, such as body size, affect rates of morphological evolution? Can we experimentally demonstrate macroevolutionary patterns in local habitats?
Ecological specialization
How can we better quantify ecological specialization? How does taxonomic revision impact delimitation of specialization? How does specialization influence the diversification of lineages?
Evolution of song
How do abiotic and biotic factors affect song complexity? How has song evolved over both deep time and more recently through anthropogenic climate change?