The Endangered Species Act and the Convention on International Trade in Wild Flora and Fauna are two laws that seek to protect the world's wildlife resources. The fur trade condemns poaching and supports enforcement of all wildlife conservation laws. Adequate nesting, feeding and shelter sites are vital to the survival of all species. While human activities such as land development cause habitat loss, they are not the only causes. Sometimes, the animals themselves contribute to habitat loss.
Overpopulation can cause a variety of serious problems for animals and humans.
When a species overpopulates, its habitat can change drastically. As the population grows, the demand for food grows, too. If the population continues to expand unchecked, it can become so large that food supplies are depleted, and the habitat is no longer able to sustain all of the animals. When this happens, the habitat is damaged. Habitat damage can affect other important plant and wildlife species and present problems for humans, as well.