Most achieve their color through structural coloration, an optical illusion caused by the way light interacts with microscopic structures in their feathers. That said, whether their green is real ...

Birds are vertebrate animals adapted for flight ... The leading edge is thicker than the back edge, and they are covered in feathers that narrow to a point. Airplane wings are modeled after ...

These telltale features are evidence of where ligaments attached flight feathers to bone and are considered proof that Velociraptor sported a fine feathery coat. The dinosaur's plumage may have ...