Big cats are in trouble, from lions in Kenya to snow leopards in the Himalayas. In response to the crisis, the National Geographic Society has launched the Big Cats Initiative, led by Explorers-in-Residence Dereck and Beverly Joubert. Having lived and worked in some of Africa’s most remote areas for more than 25 years as authors and filmmakers, the Jouberts have embraced the cause of wildlife conservation, especially for big cats. Here, a male African lion stands in the sunrise mist. Duba Plains, Okavango Delta, Botswana. More information on how to help save the big cats is available here. Beverly Joubert The initiative led by the Jouberts, shown here, is a comprehensive program that supports on-the-ground conservation projects, education and economic incentive efforts, and a global public-awareness campaign. The program will first target lions, whose populations are dying off rapidly across Africa, the goal being to halt lion population declines by the year 2015 and to restore populations to sustainable levels by 2020. Beverly Joubert Lions in Duba Plains, Okavango Delta, Botswana. Beverly Joubert Female African lions and cubs walking through water in the Okavango Delta, Botswana. Beverly Joubert National Geographic Explorers-in-Residence Dereck and Beverly Joubert at work. Beverly Joubert A male lion in the Savuti Region, Chobe National Park, Botswana. Beverly Joubert A female African lion in the tall grasses in the Okavango Delta, Botswana. Beverly Joubert Portrait of a lioness and her two cubs. Duba Plains, Okavango Delta, Botswana. Beverly Joubert National Geographic Explorers-in-Residence Dereck and Beverly Joubert in the field in Africa. Beverly Joubert African lion resting near a palm. Duba Plains, Okavango Delta, Botswana. Beverly Joubert Beverly Joubert captures the wildlife of Africa with her camera. Beverly Joubert Dereck Joubert works in the field in Africa. Beverly Joubert A leopard with a young cub. Mombo, Okavango Delta, Botswana. Beverly Joubert A leopard hidden behind grass, Africa. Beverly Joubert