Current research projects include:
(1) the adaptive basis of conspecific brood parasitism and parental tactics in waterbirds, particularly several species of coots (Fulica) breeding in North and South America,
(2) the evolution of ornamented offspring through parental choice in the genus Fulica,
(3) the ecology and evolution of obligate brood parasitism in the black-headed duck of Argentina and
(4) social signals and mating systems in lazuli and lark buntings in western North America.