John G. Ewen is a Senior Research Fellow at the Institute of Zoology, Zoological Society of London, and a member of the IUCN SSC Conservation Translocation Specialist Group. His research focuses on conservation translocations, often through providing decision support to recovery programmes. He is Co-chair of New Zealand's Hihi Recovery Group and Chair of the United States Fish and Wildlife Service's Sihek Recovery Team, and is involved in several conservation translocation projects globally.