The Humane Society of the United States (HSUS) is an organization that promotes the protection of all animals and it has been active ever since 1954. This organization has nearly ten million members and the numbers are increasingly growing. The Humane Society of the United States is the largest and the most influential animal protection organization in the U.S.

However, the organization is active all over the world, even in Asia, Canada, Australia, and in Europe too. The website of this organization contains useful information about animals, how they should be treated and even information on the animal protection legislation. People who are interested can get a Humane Society of the United States credit card as well.

Another important organization is the World Wildlife Fund. It aims to preserve nature and protect wild animals. The World Wildlife Fund uses advanced scientific knowledge to find the best ways in which life on Earth can be preserved, and also the balance needed for the survival of endangered ecological systems. Endangered species of animals and plants are, of course, their main concern, but natural areas in general are a priority too. The World Wildlife fund also advocates for the efficient use of resources and of energy. They encourage and support all efforts for reducing pollution, as well. The website of this organization also contains useful information on how people can get involved, what the most endangered species are and it also contains photos, free wallpapers and e-cards and so on and so forth.

The Animal Rescue Site is yet another similar entity. The Animal Rescue Site has taken care of over 27 million abandoned animals that had been left in the care of various shelters. And last but not least, there is the Save The Tiger Fund which protects the remaining Asian wild tigers.