There are specific laws that say what you can kill like hunting bans. For example you are never allowed to kill a Key Deer because they are extremely endangered. There is the Migratory Bird Treaty Act which is a law between Canada, Great Britain, and America saying that any birds migrating to or from each country are not allowed to be killed. There is the Wilderness Act which was signed by President Lyndon Johnson and this gives 9.1 million acres of land to help animals keep their natural habitat. Lastly, there is the Captive Wildlife Safety Act. This act prohibits the transport of big cats because many of them are endangered. These laws have helped tremendously and the ESA would not have such a success at all without