I am a conservation biologist with expertise in threatened species, impact of climate change on biodiversity, species extinction risks, and species recovery. My current research focuses on quantifying species recovery and conservation success; measuring the range of a species; deciding when to list a species as Extinct; and assessing the vulnerability of species to climate change. I am Chair of the Red List Standards and Petitions Committee of the IUCN Species Survival Commission, the world's largest network of conservation scientists and practitioners. Our committee develops guidelines for threatened species assessments, and rules on petitions against the red-listing of these species. I am also a member of the IUCN task force that developed the Green Status of Species, which focuses on measuring the recovery of species, and calculating the impact of conservation actions.
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