The Western drought has exacerbated a water crisis, years in the making, that threatens the health of millions of birds — and so much more.

The month’s best (and worst) environmental news, along with other stories, science and context you don’t want to miss.

American fisheries feed an intense global demand for shark fins. A new bill could help close several critical gaps in the rules.

The United States has failed to take leadership in the Convention on Biological Diversity. Its most biodiverse state can fill that gap.

The American West contains 620,000 miles of fencing, threatening the migration of pronghorn, mule deer and other species.

Years of work in the Pacific Northwest is paying off. It started with preserving the ecosystem so native species would have something to return to.

As development of large solar projects speeds up, researchers race against the clock to study the ecosystem implications.

This critically endangered, fanged deer species is losing out to the snaring crisis in Laos and Vietnam.

A rise in container-ship accidents adds to the growing marine plastic pollution problem and poses risks to ocean health, wildlife and mariners.

It wasn’t the Roman gladiators that did in this black-maned beast, but the exact date of its disappearance remains a mystery.