World Wildlife Fund The world's largest and most experienced independent conservation organization, with around 5 million supporters and a global network of 27 national organizations, 5 associates, and 21 program offices.
ASPCA Promotes humane principles, prevents cruelty, and alleviates pain, fear and suffering of animals.
National Audubon Society The mission of the National Audubon Society is to conserve and restore natural ecosystems, focusing on birds and other wildlife for the benefit of humanity and the earth's biological diversity.
National Wildlife Federation - NWF NWF focuses its efforts on five core issue areas: Endangered Habitat, Water Quality, Land Stewardship, Wetlands, and Sustainable Communities.
Wildlife Land Trust The Humane Society of the United States Wildlife Land Trust works with landowners worldwide to protect wild animals by permanently preserving their natural habitats.
PETA The largest animal rights organization in the world.
Ocean Planet Oceanography site by the Smithsonian Institute.
Audubon Institute The Audubon Institute's goal is to foster appreciation and, ultimately, conservation of these ecosystems, which are showcased in an outstanding collection of nine museums and parks dedicated to nature, and another on the way.
The Gorilla Foundation The Gorilla Foundation/Koko.org promotes the protection, preservation and propagation of gorillas.
Animal Diversity Web Includes information about the structure and classification of animals, basic concepts of ecology and evolutionary biology, brief reports on dozens of animals, and lots of pictures.
National Fish & Wildlife Foundation Dedicated to promoting conservation and sustainable use of our natural resources through environmental education, natural resource management, habitat protection, ecosystem restoration, and public policy development.
Save the Manatee Club Save the Manatee Club was established in 1981 by former Florida Governor Bob Graham and singer/songwriter Jimmy Buffett. SMC was started so the public could participate in conservation efforts to save endangered manatees from extinction.