Care2 - Environment network for healthy living and a healthy planet that helps environment and wildlife conservation efforts.
Defenders of Wildlife - dedicated to the protection of all native wild animals and plants in their natural communities.
Earthwatch Institute - Provides research and allows volunteers to participate.
Environmental Defense - dedicated to protecting the environmental rights of all people, including future generations. Among these rights are clean air and water, healthy and nourishing food, and a flourishing ecosystem.
Friends of Animals - Helps protect animals from cruelty, abuse and exploitation.
Get Green - Get Green's mission is to inform the public about ways to save money and save the environment at the same time.
National Parks Conservation Society - Helps to safeguard the scenic beauty, wildlife, and historical and cultural treasures of the largest and most diverse park system in the world - the US Park System.
National Wildlife Federation - focuses on five core areas (Endangered Habitat, Water Quality, Land Stewardship, Wetlands and Sustainable Communities), and pursues a range of Educational projects and Activist, Advocacy and Litigation initiatives within these core aras.
Rainforest Alliance - Helps to protect ecosystems and the people and wildlife that live within them by implementing better business practices for biodiversity conservation and sustainability.
The Nature Conservancy - organization working to protect endangered species and ecosystems through land acquisition and research.
The Ocean Conservancy - combines science-based advocacy, grassroots activism, litigation, education and outreach to find lasting solutions to issues affecting our oceans and all marine life.
Wildlife Conservation Society - conservation organization, protecting and promoting a world rich in wildlife and wilderness
World Wildlife Fund - World's largest conservation organization with over 4.7 million supporters in over 100 countries.