Birds that feed on nectar or fruit evolved better mechanisms for managing metabolism, blood pressure and high glucose.

Though previous research has shown that bird populations are declining across North America, a new study is the first to show that the pace of loss has picked up speed since the mid-1980s in three ...

The accelerating decline of birds is a bellwether of far deeper biodiversity crisis — one that threatens not only beloved species but the humans who live alongside them.

After a week of failed efforts, morale was dropping (unlike the birds). If anything, the enemy seemed to be adapting to the situation. An army observer apparently noted that the emu’s had established ...

Warming and intensive farming are accelerating bird population declines across North America, a new Science study finds, with major risks for ecosystems and human well-being.