Photo Gallery: Big Cats

Two young male lions lie in the grass of Botswana's Okavango Delta. A pride of lions may be headed by a single male or a coalition of up to seven males who cooperatively defend the group's territory.

National Geographic is working to avert the lions' extinction with the Maasailand Emergency Fund. Donations will be used to support animal husbandry education and job creation for the Maasai, among other endeavors.