In Defense of Animals

In Defense of Animals (IDA) is an animal protection organization founded in 1983 in San Rafael, California, United States. The group's slogan is "working to protect the rights, welfare, and habitats of animals".

IDA has become known, in particular, for its campaigns against animal experiments conducted by the U.S. military, and experiments in which baby monkeys are separated from their mothers. Journalist and author Deborah Blum has described its strategy as "pure pit bull. It picks a target carefully and refuses to let go".