1. BirdLife International, Wellbrook Court, Girton Road, Cambridge CB3 0NA, UK
2. Institute of Zoology, Zoological Society of London, Regents Park, London NW1 4RY, UK
3. CI/CABS-IUCN/SSC Biodiversity Assessment Unit, c/o Center for Applied Biodiversity Science, Conservation International, 1919 M Street, NW Street 600, Washington, DC 20036, USA
4. Applied Biomathematics, 100 North Country Road, Setauket, NY 11733, USA
5. IUCN Red List Programme, IUCN/SSC UK Office, 219c Huntingdon Road, Cambridge CB3 0DL, UK