Why it's awesome: The hoatzin is often regarded as one of the world's strangest birds. Hatchlings are born with clawed wings ...

For centuries, scientists have observed that animals in warmer climates have longer limbs—a pattern known as Allen's Rule.

According to the Cornell Lab or Ornithology, there are four general wing shapes that allow birds to do specific things, such ...

Jace Fox was enthralled. It was his first encounter with a microscope and when he viewed the bird feather magnified, he said, ...

Birds are vertebrate animals adapted for flight. Many can also run, jump, swim, and dive. Some, like penguins, have lost the ability to fly but retained their wings. Birds are found worldwide and ...

A spat between birds at a backyard birdfeeder highlights ... A classic study in songbirds by Robert MacArthur, one of the founders of modern ecology, suggested that similar wood warblers—insect ...