The survival of an endangered songbird species is further threatened because so few of its adults remain to teach love songs.

Causes range from disease to toxicity to climate change -- but all boil down to human activity.

"Whether this inbreeding compromises their fitness, their ability to survive, we do not yet know."

Scientists can't pinpoint what is causing these deficiencies, but they are sure humans are to blame.

The court approached the dispute as it would a child custody case, focusing on the emotional well-being of the elephant in its judgment.

“If you look at the carcasses, some of them have fallen straight on their face, indicating they died very quickly."

The country also elevated the mammal's rank in its wildlife protection law, affording it the same protection as pandas.

The giant Larvacean traps carbon in its mucus feeding apparatus, and then discards the carbon-soaked apparatus into the deep seafloor.

More than 500 species of land animals are on the brink of extinction, and are likely to be lost within 20 years, scientists said.

The baby toad, conceived using frozen sperm, is named Olaf, after the snowman character in 'Frozen.'

Each of the hundreds of billions of insects eats their body weight in food every day.

It would be the third such mass coral bleaching to hit the world's largest reef system in five years.

Honestly, who wants the lights on every time?

Scientists theorize that smaller bodies help animals cool off more effectively as temperatures warm.

In the past decade, the world has blown past more than half of its climate points-of-no-return, and the effects are accelerating.

Mongoose-hair brushes continue to be in high demand because of how fine they are.

Nestlé, PepsiCo, General Mills and Hershey’s are among the companies named in an undercover investigative report by the Rainforest Action Network.

Humans are wreaking havoc -- and the price isn't just animal lives.