S. E. Bush

This study shows that long-distance dispersal of pigeons and doves created new ecological opportunities for their parasites to speciate through host-switching, but this opportunity decreased over time as cospeciation became more common.

This study shows that experimental evolution of parasite body size over four years leads to reproductive isolation in feather lice by causing size differences that trigger mechanical mating isolation and affect competition.

This study shows that host defense drives rapid adaptive divergence in experimentally evolving feather lice, leading to heritable color differences across generations.