U.S. Fish & Wildlife Service is operated by the Department of the Interior. The organization works for the conservation, development and management of the United States fish and wildlife resources. It is responsible for the protection of endangered species. The organization also provides opportunities to understand, appreciate and use fish and wildlife resources for the general public. U.S. Fish & Wildlife Service offers law enforcement services. The organization is also responsible managing migratory birds and restoring fisheries. It works for the conservation of wetlands and employs more than 7,400 people. The department operates international conservation, environmental quality, and safety and health divisions. In addition, U.S. Fish & Wildlife Service manages an over 90-million-acre National Wildlife Refuge System.