Saving Wildlife - Saves wildlife and wild lands through careful science, international conservation & education.
http://www.wcs.org/ more info...
The U.S. Fish and Wildlife Service - Conserves, protects and enhances fish, wildlife and plants and their habitats for the continuing benefit of the American people.
http://www.fws.gov/ more info...
Wildlife Society - An international nonprofit scientific and educational association dedicated to excellence in wildlife.
http://www.wildlife.org/ more info...
Wildlife Trusts - A UK voluntary organisation dedicated to conserving the full range of the UK’s habitats and species.
http://www.wildlifetrusts.org/ more info...
