Orcas are hunting whale sharks. Is there anything they can't take down?
Whale makes epic migration, astonishing scientists
Monarch butterflies will get federal protections as a threatened species
US wildlife officials move to add iconic monarch butterfly to threatened species list
In a first, U.S. moves to list many giraffes as endangered
Population of critically endangered right whales ticks up, but threats remain dire
What it’s like to care for some of the most endangered animals on Earth
To save nature, world leaders aim to turn words into action at biodiversity summit
Type of firefly could be first on federal endangered species list