2017 was another deadly year for panthers. How many more years can this critically endangered species survive?

Only 35 Mount Graham squirrels remain in the wild, but five captive squirrels could hold the key to their long-term survival — if we can get them to breed.

The last 150 birds of this critically endangered species rely on humans for their survival.

The disappearance of a tiny oceanic parasite, researchers warn, indicates that overfishing has caused an ecosystem to fall out of balance.

The bushmeat trade and traditional medicine could push tigers, chimpanzees, pangolins and hundreds of other species toward extinction

Wolves and polar bears are great, but so are bats, fish, plants and invertebrates (among others worthy of our attention).

Highly trained military dolphins have been dispatched to round up the last 30 vaquita porpoises and (hopefully) save the species from extinction.

They may not be the most charismatic group of species, but we can learn a lot from the lowly snail.

Research into the frog-killing chytrid fungus earns a Golden Goose Award, recognizing the value of federally funded science.

Populations of the once-common bonnet macaque have fallen 65 percent.