Catherine A ToftCatherine A. Toft was Professor Emerita in the Department of Evolution and Ecology at the University of California, Davis at the time of her death in December 2011. She was coeditor of Parasite-Host Associations: Coexistence or Conflict?

Timothy F. Wright is Associate Professor in the Department of Biology at New Mexico State University. He has studied parrots in the wild and in the laboratory for more than twenty years. Read More Read Less