National Audubon Society
545 Almshouse Road, Ivyland, PA 18974, USA;Pesticides and Birds Program, American Bird Conservancy, 1731 Connecticut Avenue, NW Washington, DC 20009, USA;Field Veterinary Program, Wildlife Conservation Society, 2300 Southern Boulevard, Bronx, NY 10460, USA;Smithsonian Migratory Bird Center, National Zoological Park, 3001 Connecticut Avenue, NW Washington, DC 20008, USA;Field Veterinary Program, Wildlife Conservation Society, 2300 Southern Boulevard, Bronx, NY 10460, USA;Ornithological Council, 1707 H Street, NW Washington, DC 20006, USA