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Photos: Scientists trace a butterfly migration route that is millions of years old

New technology gives hope to save endangered right whales
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

This tiny butterfly was thought to be gone in Florida. Gardeners and naturalists brought it back

Monarch butterflies just took a big hit. Midwesterners may see few of them this year
Beloved monarch butterflies are now listed as endangered

Opinion: Progress can be a turtle
Climate change stresses out these chipmunks. Why are their cousins so chill?
Butterflies originated in North America after splitting from moths, new study suggests
An 'extremely rare' rainbow sea slug was spotted along the coast of England

A butterfly conservatory is shutting down due to right-wing harassment