Endangered Species

11 things you didn't know about monkeys

Hidden lion population found in Ethiopia

10 animals presumed extinct in the last decade

'Songbird Forest' expands to save species

'Cinderella' tiger orphan gives birth to wild cubs

Why communal roosts are vital for bald eagles

Joel Sartore helps captive critters say 'cheese'

Shot by poachers, elephants seek human help

Meet the planet's 25 most endangered primates

Bid farewell to Nola, one of the last northern white rhinos on Earth

6 of the world's most endangered trees also look the strangest

12 facts to change the way you see elephants