Animals’ appearances are shaped by factors that include biological, environmental, and social pressures. Typically, animals ...

Despite possessing extremely dangerous venom, the tree snake can only endure the enemy's "heavenly" pecks to the eyes and ...

The day-old bird, smaller than a pinky finger, had brown fuzz all over its body. When Falk and Taylor walked closer to the nest, the chick began twitching and shaking its head—a behavior ... is a ...

Paleontologists initially compared the ancient bird to the contemporary kingfisher because of its similarly-shaped skull and beak, and diet of small fish ... Longipteryx was using its head as a weapon ...