A new study investigates an ongoing epidemic in Bay Area peregrine falcons.

The pygmy long-fingered possum and the ring-tailed glider, two marsupials believed to have died out thousands of years ago, ...

For nearly two centuries, a small brown frog living in Southeast Asian rainforests was considered a single, well-understood ...

“Living fossil” is often misused, but chitons really haven’t changed much in about 300 million years.

Without interrupting their busy sleep schedule, Australia’s cute, if cantankerous, koalas have turned a truism of genetics on its head. In short, the proliferation of certain koala populations shows ...

A new species of chiton — a tiny, armored marine mollusk from a lineage roughly 500 million years old — has been identified ...

A fire ant nest has been spotted at one of Australia’s most iconic World Heritage rainforests, sparking concerns about the ...

Earth’s vertebrate diversity may be far richer than anyone realized. A sweeping analysis of more than 300 studies suggests that for every known fish, bird, reptile, amphibian, or mammal species, there ...

You’ve probably seen a headline or two about an invasive species taking over. Perhaps you’ve seen a sign warning of ...

The world has far more bees than anyone realized. Scientists have, for the first time, estimated just how many species of ...

A new paper provides the first statistically derived estimate of bee species richness around the world. But this is about ...

Described as nature’s “self-repairing engine,” short-term species turnover isn’t increasing as scientists expect—and that’s a ...