1. RSPB Centre for Conservation Science; Royal Society for the Protection of Birds, The Lodge; Sandy Bedfordshire SG19 2DL United Kingdom
2. Island Conservation; 2161 Delaware Avenue, Suite A Santa Cruz CA 95060 U.S.A.
3. BirdLife International; Wellbrook Court, Girton Road Cambridge CB3 0NA United Kingdom
4. University of California Santa Cruz; 1156 High Street Santa Cruz CA 95064 U.S.A.