Sudan, the last known male of the northern white rhinoceros subspecies, stands for his close-up in a paddock last year at the Ol Pejeta Conservancy in Kenya. If Tinder users swipe right on Sudan's profile, they're taken to a page asking for contributions to help him reproduce.
Tony Karumba/AFP/Getty Images
M.C. Davis, former gambler and businessman, stands in his 54,000-acre preserve, Nokuse Plantation, in the Florida Panhandle. It's the largest privately owned conservation area in the southeastern United States.
A tray of sardines in Costa Mesa, California, in this November 17, 2014 photo. Plummeting sardine populations force a complete ban on sardine fishing off the U.S. West Coast for more than a year.
LUCY NICHOLSON/Reuters /Landov
A baby orangutan wearing a diaper swings through the trees at the Sumatran Orangutan Conservation Program outside Medan, capital of Indonesia's North Sumatra province. The program takes mostly orphaned orangutans, nurses them back to health and releases them back into the wild.