Sumatran rhinoceros, Indonesia

As natural habitats shrink and disappear, thousands of species, like the Sumatran rhino pictured here, are at risk of extinction. Logging and hunting have led to their inclusion on the IUCN Red List of Critically Endangered Species, joining over 38,500 threatened species. Once plentiful across Southeast Asia, fewer than 100 Sumatran rhinos live in the wild today.
© Cyril Ruoso/Minden Pictures